diff --git a/zkevm-circuits/src/circuit_tools/cell_manager.rs b/zkevm-circuits/src/circuit_tools/cell_manager.rs
index d3ba2c695b..457d571c7d 100644
--- a/zkevm-circuits/src/circuit_tools/cell_manager.rs
+++ b/zkevm-circuits/src/circuit_tools/cell_manager.rs
@@ -1,13 +1,21 @@
 //! Cell manager
-use crate::util::Expr;
-use eth_types::Field;
+use crate::{util::Expr};
+use crate::evm_circuit::util::CachedRegion;
+use eth_types::{Field, Hash};
 use halo2_proofs::{
     circuit::{AssignedCell, Region, Value},
     plonk::{Advice, Column, Error, Expression, VirtualCells},
     poly::Rotation,
 };
+use lazy_static::__Deref;
+use std::collections::HashMap;
+use std::cmp::{max, Ordering};
 use std::{any::Any, collections::BTreeMap};
 
+// Todo(Cecilia): config this number somewhere
+pub(crate) const N_BYTE_LOOKUPS: usize = 4;
+
+
 #[derive(Clone)]
 pub(crate) struct DataTransition<F> {
     prev: Expression<F>,
@@ -118,6 +126,25 @@ impl<F: Field> Cell<F> {
             || Value::known(value),
         )
     }
+
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<'_, '_, F>,
+        offset: usize,
+        value: F,
+    ) -> Result<AssignedCell<F, F>, Error> {
+        region.assign_advice(
+            || {
+                format!(
+                    "Cell column: {:?} and rotation: {}",
+                    self.column, self.rotation
+                )
+            },
+            self.column.unwrap(),
+            offset + self.rotation,
+            || Value::known(value),
+        )
+    }
 }
 
 impl<F: Field> Expr<F> for Cell<F> {
@@ -135,8 +162,21 @@ impl<F: Field> Expr<F> for &Cell<F> {
 /// CellType
 #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
 pub enum CellType {
-    /// General
+    /// Storage type
     Storage,
+    /// Lookup Byte
+    LookupByte,
+    /// Lookup outter tables
+    Lookup(Table), 
+}
+
+/// Table being lookuped by cell
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
+pub enum Table {
+    /// Table type
+    Fixed,
+    /// Table type
+    Keccak,
 }
 
 /// CellColumn
@@ -148,22 +188,243 @@ pub struct CellColumn<F> {
     pub(crate) expr: Expression<F>,
 }
 
+impl<F: Field> PartialEq for CellColumn<F> {
+    fn eq(&self, other: &Self) -> bool {
+        self.index == other.index && self.cell_type == other.cell_type && self.height == other.height 
+    }
+}
+
+impl<F: Field> Eq for CellColumn<F> {}
+
+impl<F: Field> PartialOrd for CellColumn<F> {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        self.height.partial_cmp(&other.height)
+    }
+}
+
+impl<F: Field> Ord for CellColumn<F> {
+    fn cmp(&self, other: &Self) -> Ordering {
+        self.height.cmp(&other.height)
+    }
+}
+
 impl<F: Field> Expr<F> for CellColumn<F> {
     fn expr(&self) -> Expression<F> {
         self.expr.clone()
     }
 }
 
+/// CellManager with context
+#[derive(Clone, Debug)]
+pub struct CellManager_<F> {
+    width: usize,
+    height: usize,
+    // current ctx
+    cells: Vec<Cell<F>>,
+    columns: Vec<CellColumn<F>>,
+    // branch ctxs
+    branch_ctxs: HashMap<String, CmContext<F>>,
+    parent_ctx: Option<CmContext<F>>,
+}
+
+
+#[derive(Default, Clone, Debug)]
+struct CmContext<F>{
+    parent: Box<Option<CmContext<F>>>,
+    columns: Vec<CellColumn<F>>,
+}
+
+impl<F: Field>  CellManager_<F> {
+    
+    pub(crate) fn cur_to_parent(&mut self) {
+        let new_parent = match self.parent_ctx.clone() {
+            // if parent context exists, meaning we are deep in a callstack
+            // we set it as the parent of new parent
+            Some(ctx) => CmContext {
+                parent: Box::new(Some(ctx.clone())),
+                columns: self.columns.clone(),
+            },
+            // otherwise, this is the fist level of callstack
+            // the parent of new parent is None
+            None => CmContext {
+                parent: Box::new(None),
+                columns: self.columns.clone(),
+            }
+        };
+        self.parent_ctx = Some(new_parent);
+        self.reset();
+    }
+
+    pub(crate) fn cur_to_branch(&mut self, name: &str) {
+        let new_branch = match self.parent_ctx.clone() {
+            // if parent context exists, meaning we are deep in a callstack
+            // we set it as the parent of new branch
+            Some(ctx) => CmContext {
+                parent: Box::new(Some(ctx.clone())),
+                columns: self.columns.clone(),
+            },
+            // otherwise, this is the fist level of callstack
+            // the parent of new branch is None
+            None => CmContext {
+                parent: Box::new(None),
+                columns: self.columns.clone(),
+            }
+        };
+        self.branch_ctxs.insert(name.to_string(), new_branch);
+        self.reset();
+    }
+
+    pub(crate) fn recover_parent(&mut self) {
+        assert!(self.parent_ctx.is_some(), "No parent context to recover");
+        self.columns = self.parent_ctx.clone().unwrap().columns.clone();
+        self.parent_ctx
+            .clone()
+            .map(|ctx| self.parent_ctx = ctx.parent.deref().clone())
+            .unwrap();
+        self.branch_ctxs.clear();
+    }
+
+    pub(crate) fn recover_branch(&mut self, name: &str) {
+        self.branch_ctxs.get(name).map(|ctx| {
+            assert!(ctx.parent.is_some(), "Cannot have sibling without parent");
+            self.columns = ctx.columns.clone();
+        }).expect("CellManager has no specified context.");
+        self.branch_ctxs.remove(name);
+    }
+
+    pub(crate) fn recover_max_branch(&mut self) {
+        let mut new_cols = self.columns.clone();
+        let parent = self.parent_ctx.clone().expect("Retruning context needs parent");
+        self.branch_ctxs
+            .iter()
+            .map(|(name, ctx)| {
+                for c in 0..self.width {
+                    new_cols[c] = max(&new_cols[c], &ctx.columns[c]).clone();
+                    new_cols[c] = max(&new_cols[c], &parent.columns[c]).clone();
+                }
+            });
+        self.columns = new_cols;
+        self.branch_ctxs.clear();
+        self.parent_ctx = self.parent_ctx
+            .clone()
+            .map(|ctx| ctx.parent.deref().clone())
+            .unwrap();
+    }
+
+    pub(crate) fn new(meta: &mut VirtualCells<F>, advice_columns: &[Column<Advice>]) -> Self {
+        // Setup the columns and query the cells
+        let width = advice_columns.len();
+        let height = 32;
+        let mut cells = Vec::with_capacity(height * width);
+        let mut columns = Vec::with_capacity(width);
+        for c in 0..width {
+            for r in 0..height {
+                cells.push(Cell::new(meta, advice_columns[c], r));
+            }
+            columns.push(CellColumn {
+                index: c,
+                cell_type: CellType::Storage,
+                height: 0,
+                expr: cells[c * height].expr(),
+            });
+        }
+        let mut column_idx = 0;
+
+    
+        for i in 0usize..N_BYTE_LOOKUPS {
+            columns[i].cell_type = CellType::LookupByte;
+            assert_eq!(advice_columns[column_idx].column_type().phase(), 0);
+            column_idx += 1;
+        }
+
+
+        Self {
+            width,
+            height,
+            cells,
+            columns,
+            branch_ctxs: HashMap::new(),
+            parent_ctx: None,
+        }
+    }
+
+    pub(crate) fn query_cells(&mut self, cell_type: CellType, count: usize) -> Vec<Cell<F>> {
+        let mut cells = Vec::with_capacity(count);
+        while cells.len() < count {
+            let column_idx = self.next_column(cell_type);
+            let column = &mut self.columns[column_idx];
+            cells.push(self.cells[column_idx * self.height + column.height].clone());
+            column.height += 1;
+        }
+        cells
+    }
+
+    pub(crate) fn query_cell(&mut self, cell_type: CellType) -> Cell<F> {
+        self.query_cells(cell_type, 1)[0].clone()
+    }
+
+
+    pub(crate) fn reset(&mut self) {
+        for column in self.columns.iter_mut() {
+            column.height = 0;
+        }
+    }
+
+    fn next_column(&self, cell_type: CellType) -> usize {
+        let mut best_index: Option<usize> = None;
+        let mut best_height = self.height;
+        for column in self.columns.iter() {
+            // if cell_type == CellType::LookupByte {
+            //     println!("column.cell_type: {:?}, column.index: {:?}, cell_type: {:?}", column.cell_type, column.index, cell_type);
+            // }
+            if column.cell_type == cell_type && column.height < best_height {
+                best_index = Some(column.index);
+                best_height = column.height;
+            }
+        }
+        match best_index {
+            Some(index) => index,
+            None => unreachable!("not enough cells for query: {:?}", cell_type),
+        }
+    }
+
+    pub(crate) fn get_height(&self) -> usize {
+        self.columns
+            .iter()
+            .map(|column| column.height)
+            .max()
+            .unwrap()
+    }
+
+    /// Returns a map of CellType -> (width, height, num_cells)
+    pub(crate) fn get_stats(&self) -> BTreeMap<CellType, (usize, usize, usize)> {
+        let mut data = BTreeMap::new();
+        for column in self.columns.iter() {
+            let (mut count, mut height, mut num_cells) =
+                data.get(&column.cell_type).unwrap_or(&(0, 0, 0));
+            count += 1;
+            height = height.max(column.height);
+            num_cells += column.height;
+            data.insert(column.cell_type, (count, height, num_cells));
+        }
+        data
+    }
+
+    pub(crate) fn columns(&self) -> &[CellColumn<F>] {
+        &self.columns
+    }
+}
+
 /// CellManager
 #[derive(Clone, Debug)]
-pub struct CellManager<F> {
+pub struct _CellManager<F> {
     width: usize,
     height: usize,
     cells: Vec<Cell<F>>,
     columns: Vec<CellColumn<F>>,
 }
 
-impl<F: Field> CellManager<F> {
+impl<F: Field> _CellManager<F> {
     pub(crate) fn new(meta: &mut VirtualCells<F>, advice_columns: &[Column<Advice>]) -> Self {
         // Setup the columns and query the cells
         let width = advice_columns.len();
@@ -181,6 +442,15 @@ impl<F: Field> CellManager<F> {
                 expr: cells[c * height].expr(),
             });
         }
+        let mut column_idx = 0;
+
+    
+        for i in 0usize..N_BYTE_LOOKUPS {
+            columns[i].cell_type = CellType::LookupByte;
+            assert_eq!(advice_columns[column_idx].column_type().phase(), 0);
+            column_idx += 1;
+        }
+
 
         Self {
             width,
@@ -205,6 +475,7 @@ impl<F: Field> CellManager<F> {
         self.query_cells(cell_type, 1)[0].clone()
     }
 
+
     pub(crate) fn reset(&mut self) {
         for column in self.columns.iter_mut() {
             column.height = 0;
@@ -215,6 +486,9 @@ impl<F: Field> CellManager<F> {
         let mut best_index: Option<usize> = None;
         let mut best_height = self.height;
         for column in self.columns.iter() {
+            if cell_type == CellType::LookupByte {
+                println!("column.cell_type: {:?}, column.index: {:?}, cell_type: {:?}", column.cell_type, column.index, cell_type);
+            }
             if column.cell_type == cell_type && column.height < best_height {
                 best_index = Some(column.index);
                 best_height = column.height;
diff --git a/zkevm-circuits/src/circuit_tools/constraint_builder.rs b/zkevm-circuits/src/circuit_tools/constraint_builder.rs
index bf9763a24e..bfe6a4f4f5 100644
--- a/zkevm-circuits/src/circuit_tools/constraint_builder.rs
+++ b/zkevm-circuits/src/circuit_tools/constraint_builder.rs
@@ -1,11 +1,11 @@
 //! Circuit utilities
-use crate::{evm_circuit::util::rlc, util::Expr};
+use crate::{evm_circuit::{util::rlc, table::Lookup}, util::Expr};
 use eth_types::Field;
 use gadgets::util::{and, select, sum, Scalar};
-use halo2_proofs::plonk::{ConstraintSystem, Expression};
+use halo2_proofs::{plonk::{ConstraintSystem, Expression, Column, Fixed}, poly::Rotation};
 use itertools::Itertools;
 
-use super::cell_manager::{Cell, CellManager, CellType, DataTransition, Trackable};
+use super::cell_manager::{Cell, CellManager_, CellType, DataTransition, Trackable};
 
 /// Lookup data
 #[derive(Clone)]
@@ -32,14 +32,14 @@ pub struct ConstraintBuilder<F> {
     pub lookup_tables: Vec<LookupData<F>>,
     /// Query offset
     pub query_offset: i32,
-    /// CellManager
-    pub cell_manager: Option<CellManager<F>>,
+    /// CellManager_
+    pub cell_manager: Option<CellManager_<F>>,
     /// Tracked objects
     objects: Vec<Box<dyn Trackable>>,
 }
 
 impl<F: Field> ConstraintBuilder<F> {
-    pub(crate) fn new(max_degree: usize, cell_manager: Option<CellManager<F>>) -> Self {
+    pub(crate) fn new(max_degree: usize, cell_manager: Option<CellManager_<F>>) -> Self {
         ConstraintBuilder {
             constraints: Vec::new(),
             max_degree,
@@ -52,10 +52,34 @@ impl<F: Field> ConstraintBuilder<F> {
         }
     }
 
-    pub(crate) fn set_cell_manager(&mut self, cell_manager: CellManager<F>) {
+    pub(crate) fn set_cell_manager(&mut self, cell_manager: CellManager_<F>) {
+        println!("set_cell_manager");
         self.cell_manager = Some(cell_manager);
     }
 
+    pub(crate) fn enter_branch_context(&mut self) {
+        println!("=====>");
+        match self.cell_manager.as_mut() {
+            Some(cm) => cm.cur_to_parent(),
+            None => ()
+        };   
+    }
+
+    pub(crate) fn switch_branch_context(&mut self, branch_name: &str) {
+        match self.cell_manager.as_mut() {
+            Some(cm) => cm.cur_to_branch(branch_name),
+            None => ()
+        }; 
+    }
+
+    pub(crate) fn exit_branch_context(&mut self) {
+        println!("^*****");
+        match self.cell_manager.as_mut() {
+            Some(cm) => cm.recover_max_branch(),
+            None => ()
+        }; 
+    }
+
     pub(crate) fn require_zero(&mut self, name: &'static str, constraint: Expression<F>) {
         self.add_constraint(name, constraint);
     }
@@ -129,8 +153,7 @@ impl<F: Field> ConstraintBuilder<F> {
     }
 
     pub(crate) fn query_byte(&mut self) -> Cell<F> {
-        // TODO(Brecht): fix
-        self.query_cell_with_type(CellType::Storage)
+        self.query_cell_with_type(CellType::LookupByte)
     }
 
     pub(crate) fn query_bytes<const N: usize>(&mut self) -> [Cell<F>; N] {
@@ -138,7 +161,7 @@ impl<F: Field> ConstraintBuilder<F> {
     }
 
     pub(crate) fn query_bytes_dyn(&mut self, count: usize) -> Vec<Cell<F>> {
-        self.query_cells(CellType::Storage, count)
+        self.query_cells(CellType::LookupByte, count)
     }
 
     pub(crate) fn query_cell(&mut self) -> Cell<F> {
@@ -173,20 +196,39 @@ impl<F: Field> ConstraintBuilder<F> {
     }
 
     pub(crate) fn generate_lookups<S: AsRef<str>>(
-        &self,
+        &mut self,
         meta: &mut ConstraintSystem<F>,
-        lookup_names: &[S],
+        byte_table: [Column<Fixed>; 1],
+        lookup_names: &[S], 
+        // "keccek", "fixed", "parent_s" ,"parent_c","parent_s", "key_s", "key_c"
     ) {
-        for lookup_name in lookup_names.iter() {
+        if let Some(cm) = self.cell_manager.clone() {
+            for column in cm.columns() {
+                match column.cell_type {
+                    CellType::Storage => (),
+                    CellType::LookupByte => {
+                        meta.lookup_any("Byte lookup", |meta| {
+                            let byte_table_expression = meta.query_fixed(byte_table[0], Rotation::cur());
+                            vec![(column.expr(), byte_table_expression)]
+                        });
+                    },
+                    CellType::Lookup( .. ) => ()
+                }
+            }
+        }
+        for lookup_name in lookup_names.iter() { 
             let lookups = self
                 .lookups
                 .iter()
                 .cloned()
                 .filter(|lookup| lookup.tag == lookup_name.as_ref())
                 .collect::<Vec<_>>();
+            // [ "parent_s" ,"parent_c","parent_s", "key_s", "key_c"]
             for lookup in lookups.iter() {
                 meta.lookup_any(lookup.description, |_meta| {
+                    // 拿对应的表
                     let table = self.get_lookup_table_values(lookup_name);
+                    // 拿要查的值
                     let mut values: Vec<_> = lookup
                         .values
                         .iter()
@@ -329,6 +371,7 @@ impl<F: Field> ConstraintBuilder<F> {
     pub(crate) fn set_query_offset(&mut self, query_offset: i32) {
         self.query_offset = query_offset;
     }
+
 }
 
 pub(crate) fn merge_lookups<F: Field>(
@@ -993,10 +1036,17 @@ macro_rules! _matchx {
     ($cb:expr, $($condition:expr => $when:expr),* $(, _ => $catch_all:expr)? $(,)?)  => {{
         let mut conditions = Vec::new();
         let mut cases = Vec::new();
+        $cb.enter_branch_context();
+        println!("$cb.enter_branch_context -- _matchx");
+
         $(
             $cb.push_condition($condition.expr());
             let ret = $when.clone();
             $cb.pop_condition();
+
+            println!("$cb.switch_branch_context: {:?}", stringify!($condition));
+            $cb.switch_branch_context(stringify!($condition));
+
             cases.push(($condition.expr(), ret));
             conditions.push($condition.expr());
         )*
@@ -1006,6 +1056,10 @@ macro_rules! _matchx {
             $cb.push_condition(catch_all_condition.expr());
             let ret = $catch_all;
             $cb.pop_condition();
+
+            println!("$cb.switch_branch_context: catch_all_condition");
+            $cb.switch_branch_context("catch_all_condition");
+
             cases.push((catch_all_condition.expr(), ret));
             conditions.push(catch_all_condition.expr());
         )*
@@ -1017,6 +1071,9 @@ macro_rules! _matchx {
         // Exactly 1 case needs to be enabled
         _require!($cb, sum::expr(&conditions) => 1);
 
+        println!("$cb.exit_branch_context -- _matchx");
+        $cb.exit_branch_context();
+        
         cases.apply_conditions()
     }};
 }
@@ -1025,11 +1082,19 @@ macro_rules! _matchx {
 #[macro_export]
 macro_rules! _ifx {
     ($cb:expr, $($condition:expr),* => $when_true:block $(elsex $when_false:block)?)  => {{
+        
+        let descr = stringify!($($condition)*);
         let condition = and::expr([$($condition.expr()),*]);
 
+        $cb.enter_branch_context();
+        println!("$cb.enter_branch_context");
+
         $cb.push_condition(condition.expr());
         let ret_true = $when_true;
         $cb.pop_condition();
+    
+        println!("$cb.switch_branch_context: {:?}{:?}", "ifx!", descr);
+        $cb.switch_branch_context(&format!("{:?}{:?}", "ifx!", descr));
 
         #[allow(unused_assignments, unused_mut)]
         let mut ret = ret_true.conditional(condition.expr());
@@ -1041,8 +1106,13 @@ macro_rules! _ifx {
             let ret_false = $when_false;
             $cb.pop_condition();
 
+            println!("$cb.switch_branch_context: {:?}{:?}", "elsex", descr);
+            $cb.switch_branch_context(&format!("{:?}{:?}", "elsex", descr));
+
             ret = ret_true.select(condition.expr(), &ret_false);
         )*
+        println!("$cb.exit_branch_context");
+        $cb.exit_branch_context();
         ret
     }};
 }
diff --git a/zkevm-circuits/src/circuit_tools/gadgets.rs b/zkevm-circuits/src/circuit_tools/gadgets.rs
index b1e21c5c9c..25909bbab3 100644
--- a/zkevm-circuits/src/circuit_tools/gadgets.rs
+++ b/zkevm-circuits/src/circuit_tools/gadgets.rs
@@ -6,7 +6,7 @@ use halo2_proofs::{
     plonk::{Error, Expression},
 };
 
-use crate::evm_circuit::util::{from_bytes, pow_of_two};
+use crate::evm_circuit::util::{from_bytes, pow_of_two, CachedRegion};
 
 use super::{cell_manager::Cell, constraint_builder::ConstraintBuilder};
 
@@ -53,6 +53,22 @@ impl<F: Field> IsZeroGadget<F> {
             F::zero()
         })
     }
+
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        value: F,
+    ) -> Result<F, Error> {
+        let inverse = value.invert().unwrap_or(F::zero());
+        self.inverse.assign_cached(region, offset, inverse)?;
+        Ok(if value.is_zero().into() {
+            F::one()
+        } else {
+            F::zero()
+        })
+    }
+
 }
 
 /// Returns `1` when `lhs == rhs`, and returns `0` otherwise.
@@ -85,6 +101,18 @@ impl<F: Field> IsEqualGadget<F> {
     ) -> Result<F, Error> {
         self.is_zero.assign(region, offset, lhs - rhs)
     }
+
+
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        lhs: F,
+        rhs: F,
+    ) -> Result<F, Error> {
+        self.is_zero.assign_cached(region, offset, lhs - rhs)
+    }
+
 }
 
 /// Returns `1` when `lhs < rhs`, and returns `0` otherwise.
@@ -154,6 +182,29 @@ impl<F: Field, const N_BYTES: usize> LtGadget<F, N_BYTES> {
         Ok((if lt { F::one() } else { F::zero() }, diff_bytes.to_vec()))
     }
 
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        lhs: F,
+        rhs: F,
+    ) -> Result<(F, Vec<u8>), Error> {
+        // Set `lt`
+        let lt = lhs < rhs;
+        self.lt
+            .assign_cached(region, offset, if lt { F::one() } else { F::zero() })?;
+
+        // Set the bytes of diff
+        let diff = (lhs - rhs) + (if lt { self.range } else { F::zero() });
+        let diff_bytes = diff.to_repr();
+        for (idx, diff) in self.diff.as_ref().unwrap().iter().enumerate() {
+            diff.assign_cached(region, offset, F::from(diff_bytes[idx] as u64))?;
+        }
+
+        Ok((if lt { F::one() } else { F::zero() }, diff_bytes.to_vec()))
+    }
+    
+
     pub(crate) fn diff_bytes(&self) -> Vec<Cell<F>> {
         self.diff.as_ref().unwrap().to_vec()
     }
diff --git a/zkevm-circuits/src/circuit_tools/memory.rs b/zkevm-circuits/src/circuit_tools/memory.rs
index 78a0711962..fe92af23b3 100644
--- a/zkevm-circuits/src/circuit_tools/memory.rs
+++ b/zkevm-circuits/src/circuit_tools/memory.rs
@@ -15,7 +15,7 @@ use super::constraint_builder::{merge_lookups, ConstraintBuilder};
 
 #[derive(Clone, Debug, Default)]
 pub(crate) struct Memory<F> {
-    columns: Vec<Column<Advice>>,
+    pub(crate) columns: Vec<Column<Advice>>,
     banks: Vec<MemoryBank<F>>,
 }
 
diff --git a/zkevm-circuits/src/evm_circuit/execution.rs b/zkevm-circuits/src/evm_circuit/execution.rs
index 2607eef28c..69d2781fbb 100644
--- a/zkevm-circuits/src/evm_circuit/execution.rs
+++ b/zkevm-circuits/src/evm_circuit/execution.rs
@@ -335,6 +335,7 @@ impl<F: Field> ExecutionConfig<F> {
             let num_rows_left_next = meta.query_advice(num_rows_until_next_step, Rotation::next());
             let num_rows_left_inverse = meta.query_advice(num_rows_inv, Rotation::cur());
 
+
             let mut cb = BaseConstraintBuilder::default();
             // q_step needs to be enabled on the first row
             cb.condition(q_step_first, |cb| {
diff --git a/zkevm-circuits/src/evm_circuit/util.rs b/zkevm-circuits/src/evm_circuit/util.rs
index 2caeb7ed12..40dbf29e11 100644
--- a/zkevm-circuits/src/evm_circuit/util.rs
+++ b/zkevm-circuits/src/evm_circuit/util.rs
@@ -179,6 +179,7 @@ impl<F: FieldExt> StoredExpression<F> {
     }
 }
 
+
 #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
 pub(crate) enum CellType {
     Storage,
diff --git a/zkevm-circuits/src/mpt_circuit.rs b/zkevm-circuits/src/mpt_circuit.rs
index 0129be7ccf..399ab70f75 100644
--- a/zkevm-circuits/src/mpt_circuit.rs
+++ b/zkevm-circuits/src/mpt_circuit.rs
@@ -21,12 +21,13 @@ mod selectors;
 mod start;
 mod storage_leaf;
 mod witness_row;
+mod table;
 
 use columns::MainCols;
 use extension_branch::ExtensionBranchConfig;
 use witness_row::{MptWitnessRow, MptWitnessRowType};
 
-use param::HASH_WIDTH;
+use param::*;
 
 use self::{
     account_leaf::AccountLeafConfig,
@@ -43,11 +44,12 @@ use self::{
         AccountNode, AccountRowType, BranchNode, ExtensionBranchNode, ExtensionBranchRowType,
         ExtensionNode, Node, StartNode, StartRowType, StorageNode, StorageRowType,
     },
+    table::*,
 };
-use crate::mpt_circuit::helpers::Indexable;
+use crate::{mpt_circuit::helpers::Indexable, evm_circuit::util::CachedRegion};
 use crate::{
     assign, assignf, circuit,
-    circuit_tools::{cell_manager::CellManager, constraint_builder::merge_lookups, memory::Memory},
+    circuit_tools::{cell_manager::CellManager_, memory::Memory},
     matchr, matchw,
     mpt_circuit::{
         helpers::{extend_rand, main_memory, parent_memory, MPTConstraintBuilder},
@@ -72,6 +74,9 @@ pub struct StateMachineConfig<F> {
 pub struct MPTContext<F> {
     pub(crate) q_enable: Column<Fixed>,
     pub(crate) q_not_first: Column<Fixed>,
+    pub(crate) q_row: Column<Advice>,
+    pub(crate) q_row_inv: Column<Advice>,
+
     pub(crate) mpt_table: MptTable,
     pub(crate) main: MainCols<F>,
     pub(crate) managed_columns: Vec<Column<Advice>>,
@@ -90,6 +95,7 @@ impl<F: Field> MPTContext<F> {
             .map(|&byte| meta.query_advice(byte, Rotation(rot)))
             .collect::<Vec<_>>()
     }
+
 }
 
 /// Merkle Patricia Trie config.
@@ -97,12 +103,20 @@ impl<F: Field> MPTContext<F> {
 pub struct MPTConfig<F> {
     pub(crate) q_enable: Column<Fixed>,
     pub(crate) q_not_first: Column<Fixed>,
+
     pub(crate) main: MainCols<F>,
     pub(crate) managed_columns: Vec<Column<Advice>>,
     pub(crate) memory: Memory<F>,
+
     keccak_table: KeccakTable,
-    fixed_table: [Column<Fixed>; 3],
+    fixed_table: [Column<Fixed>; 5],
+    byte_table: [Column<Fixed>; 1],
     state_machine: StateMachineConfig<F>,
+
+    pub(crate) q_node: Column<Advice>,
+    pub(crate) q_row: Column<Advice>,
+    pub(crate) q_row_inv: Column<Advice>,
+
     pub(crate) is_start: Column<Advice>,
     pub(crate) is_branch: Column<Advice>,
     pub(crate) is_account: Column<Advice>,
@@ -112,24 +126,6 @@ pub struct MPTConfig<F> {
     cb: MPTConstraintBuilder<F>,
 }
 
-/// Enumerator to determine the type of row in the fixed table.
-#[derive(Clone, Copy, Debug)]
-pub enum FixedTableTag {
-    /// All zero lookup data
-    Disabled,
-    /// Power of randomness: [1, r], [2, r^2],...
-    RMult,
-    /// 0 - 15
-    Range16,
-    /// 0 - 255
-    Range256,
-    /// For checking there are 0s after the RLP stream ends
-    RangeKeyLen256,
-    /// For checking there are 0s after the RLP stream ends
-    RangeKeyLen16,
-}
-
-impl_expr!(FixedTableTag);
 
 #[derive(Default)]
 pub(crate) struct MPTState<F> {
@@ -157,6 +153,10 @@ impl<F: Field> MPTConfig<F> {
 
         let mpt_table = MptTable::construct(meta);
 
+        let q_node = meta.advice_column();
+        let q_row = meta.advice_column();
+        let q_row_inv = meta.advice_column();
+
         let is_start = meta.advice_column();
         let is_branch = meta.advice_column();
         let is_account = meta.advice_column();
@@ -164,11 +164,12 @@ impl<F: Field> MPTConfig<F> {
 
         let main = MainCols::new(meta);
 
-        let fixed_table: [Column<Fixed>; 3] = (0..3)
+        let fixed_table: [Column<Fixed>; 5] = (0..5)
             .map(|_| meta.fixed_column())
             .collect::<Vec<_>>()
             .try_into()
             .unwrap();
+        let byte_table = [meta.fixed_column()];
 
         let managed_columns = (0..20).map(|_| meta.advice_column()).collect::<Vec<_>>();
         let memory_columns = (0..5).map(|_| meta.advice_column()).collect::<Vec<_>>();
@@ -180,9 +181,14 @@ impl<F: Field> MPTConfig<F> {
         memory.allocate(meta, parent_memory(true));
         memory.allocate(meta, main_memory());
 
-        let ctx = MPTContext {
+        let mut cb = MPTConstraintBuilder::new(33 + 10, None, power_of_randomness.clone());
+
+        let mut ctx = MPTContext {
             q_enable: q_enable.clone(),
             q_not_first: q_not_first.clone(),
+            q_row: q_row.clone(),
+            q_row_inv: q_row_inv.clone(),
+
             mpt_table: mpt_table.clone(),
             main: main.clone(),
             managed_columns: managed_columns.clone(),
@@ -192,12 +198,15 @@ impl<F: Field> MPTConfig<F> {
 
         let mut state_machine = StateMachineConfig::default();
 
-        let mut cb = MPTConstraintBuilder::new(33 + 10, None);
+        println!("total advices {}", meta.num_advice_columns());
+
         meta.create_gate("MPT", |meta| {
-            let cell_manager = CellManager::new(meta, &ctx.managed_columns);
+            // 20 cols * 32 height in CellManager
+            let cell_manager = CellManager_::new(meta, &ctx.managed_columns);
             cb.base.set_cell_manager(cell_manager);
-
+            
             circuit!([meta, cb.base], {
+                let is_q_row_zero = 1.expr() - a!(q_row) * a!(q_row_inv);
                 // State machine
                 // TODO(Brecht): state machine constraints
                 ifx!{f!(q_enable) => {
@@ -205,22 +214,38 @@ impl<F: Field> MPTConfig<F> {
                     ifx! {not!(f!(q_not_first)) => {
                         require!(a!(is_start) => true);
                     }};
+                    // When q_row == 0, we start at a new node,
+                    // one of [is_start, is_branch, is_account, is_storage] needs to be 1,
+                    // if not we goes to  _ => require!(true => false)
+                    // Otherwise q_row > 0, we're in the middle of some node rows, all flags needs to be 0;
+                    ifx! {is_q_row_zero.expr() => {
+                        matchx! {
+                            a!(is_start) => {
+                                // require!(a!(q_row) + a!(q_node) => 0.expr());                      
+                                state_machine.start_config = StartConfig::configure(meta, &mut cb, ctx.clone());
+                            },
+                            a!(is_branch) => {
+                                state_machine.branch_config = ExtensionBranchConfig::configure(meta, &mut cb, ctx.clone());
+                            },
+                            a!(is_account) => {
+                                state_machine.account_config = AccountLeafConfig::configure(meta, &mut cb, ctx.clone());
+                            },
+                            a!(is_storage)  => {
+                                state_machine.storage_config = StorageLeafConfig::configure(meta, &mut cb, ctx.clone());
+                            },
+                            _ => require!(true => false),
+                        };
+                    } elsex {
+                        require! ((a!(is_start) + a!(is_branch) + a!(is_account) + a!(is_storage)) => 0.expr());
+                    }};
+
+                    // Lookahead
+                    // when q_row.next() != 0 then q_row.next == q_row + 1
+                    ifx! {a!(q_row, 1i32) => {
+                        require!(a!(q_row) + 1.expr() => a!(q_row, 1i32))
+                    }};
+                   
                     // Main state machine
-                    matchx! {
-                        a!(is_start) => {
-                            state_machine.start_config = StartConfig::configure(meta, &mut cb, ctx.clone());
-                        },
-                        a!(is_branch) => {
-                            state_machine.branch_config = ExtensionBranchConfig::configure(meta, &mut cb, ctx.clone());
-                        },
-                        a!(is_account) => {
-                            state_machine.account_config = AccountLeafConfig::configure(meta, &mut cb, ctx.clone());
-                        },
-                        a!(is_storage) => {
-                            state_machine.storage_config = StorageLeafConfig::configure(meta, &mut cb, ctx.clone());
-                        },
-                        _ => (),
-                    };
                     // Only account and storage rows can have lookups, disable lookups on all other rows
                     matchx! {
                         a!(is_account) => (),
@@ -255,14 +280,17 @@ impl<F: Field> MPTConfig<F> {
 
             cb.base.generate_constraints()
         });
+    
 
         let disable_lookups: usize = var("DISABLE_LOOKUPS")
             .unwrap_or_else(|_| "0".to_string())
             .parse()
             .expect("Cannot parse DISABLE_LOOKUPS env var as usize");
+        println!("DISABLE_LOOKUPS={:?}", disable_lookups);
         if disable_lookups == 0 {
             cb.base.generate_lookups(
                 meta,
+                byte_table,
                 &[
                     vec!["fixed".to_string(), "keccak".to_string()],
                     ctx.memory.tags(),
@@ -272,15 +300,16 @@ impl<F: Field> MPTConfig<F> {
         } else if disable_lookups == 1 {
             cb.base.generate_lookups(
                 meta,
+                byte_table,
                 &[vec!["keccak".to_string()], ctx.memory.tags()].concat(),
             );
         } else if disable_lookups == 2 {
-            cb.base.generate_lookups(meta, &ctx.memory.tags());
+            cb.base.generate_lookups(meta, byte_table,&ctx.memory.tags());
         } else if disable_lookups == 3 {
             cb.base
-                .generate_lookups(meta, &vec!["fixed".to_string(), "keccak".to_string()]);
+                .generate_lookups(meta, byte_table,&vec!["fixed".to_string(), "keccak".to_string()]);
         } else if disable_lookups == 4 {
-            cb.base.generate_lookups(meta, &vec!["keccak".to_string()]);
+            cb.base.generate_lookups(meta, byte_table,&vec!["fixed".to_string()]);
         }
 
         println!("num lookups: {}", meta.lookups().len());
@@ -291,6 +320,9 @@ impl<F: Field> MPTConfig<F> {
         MPTConfig {
             q_enable,
             q_not_first,
+            q_node,
+            q_row,
+            q_row_inv,
             is_start,
             is_branch,
             is_account,
@@ -299,6 +331,7 @@ impl<F: Field> MPTConfig<F> {
             managed_columns,
             memory,
             keccak_table,
+            byte_table,
             fixed_table,
             state_machine,
             r: 0.scalar(),
@@ -318,6 +351,7 @@ impl<F: Field> MPTConfig<F> {
         let mut height = 0;
         let mut memory = self.memory.clone();
 
+        // 预处理一☝️：把每行的rlp bytes搞一下
         // TODO(Brecht): change this on the witness generation side
         let mut key_rlp_bytes = Vec::new();
         for (_, row) in witness
@@ -542,6 +576,7 @@ impl<F: Field> MPTConfig<F> {
             }
         }
 
+        // 预处理二☝️：把记录变化的branch index放前面
         // TODO(Brecht): change this on the witness generation side
         let cached_witness = witness.to_owned();
         for (idx, row) in witness
@@ -556,6 +591,8 @@ impl<F: Field> MPTConfig<F> {
             }
         }
 
+        // 构造 nodes
+        // N1=[r0,r1] | N2=[r2,...,r23] | ...
         let mut nodes = Vec::new();
         let witness = witness
             .iter()
@@ -574,6 +611,7 @@ impl<F: Field> MPTConfig<F> {
                 }
             }
 
+            // 🌻 offset = 0 ｜ node_rows 0-2
             if new_proof {
                 let mut new_row = witness[offset].clone();
                 new_row.bytes = [
@@ -596,7 +634,7 @@ impl<F: Field> MPTConfig<F> {
                 node.values = node_rows;
                 nodes.push(node);
             }
-
+            // 🌻 offset = 0 ｜ node_rows 0-21
             if witness[offset].get_type() == MptWitnessRowType::InitBranch {
                 let row_init = witness[offset].to_owned();
                 let is_placeholder = row_init.is_placeholder.clone();
@@ -643,7 +681,9 @@ impl<F: Field> MPTConfig<F> {
                 node.extension_branch = Some(extension_branch_node);
                 node.values = node_rows;
                 nodes.push(node);
-            } else if witness[offset].get_type() == MptWitnessRowType::StorageLeafSKey {
+            } 
+            // 🌻 offset = 19 ｜ node_rows 22-21
+            else if witness[offset].get_type() == MptWitnessRowType::StorageLeafSKey {
                 let row_key = [&witness[offset + 0], &witness[offset + 2]];
                 let row_value = [&witness[offset + 1], &witness[offset + 3]];
                 let row_drifted = &witness[offset + 4];
@@ -731,54 +771,91 @@ impl<F: Field> MPTConfig<F> {
             || "MPT",
             |mut region| {
                 let mut pv = MPTState::new(&self.memory);
-
                 memory.clear_witness_data();
 
+                let power_of_randomness: [F; 31] = array_init::array_init(|i | self.r.pow(&[i as u64, 0, 0, 0]));
+
                 let mut offset = 0;
-                for node in nodes.iter() {
+                for (node_id, node) in nodes.iter().enumerate() {
                     // Assign bytes
                     for (idx, bytes) in node.values.iter().enumerate() {
                         for (byte, &column) in bytes.iter().zip(self.main.bytes.iter()) {
                             assign!(region, (column, offset + idx) => byte.scalar())?;
                         }
+                        let idx_scalar: F = idx.scalar();
+                        assign!(region, (self.q_node, offset + idx) => offset.scalar())?;
+                        assign!(region, (self.q_row, offset + idx) => idx_scalar)?;
+                        assign!(region, (self.q_row_inv, offset + idx) => idx_scalar.invert().unwrap_or(F::zero()))?;
                     }
 
                     // Assign nodes
                     if node.start.is_some() {
-                        //println!("{}: start", offset);
-                        assign!(region, (self.is_start, offset) => 1.scalar())?;
-                        self.state_machine.start_config.assign(
-                            &mut region,
+                        let mut cached_region = CachedRegion::new(
+                            &mut region, 
+                            power_of_randomness,
+                            TOTAL_WIDTH,
+                            StartRowType::Count as usize, 
+                            0,
+                            offset,
+                        );
+                        println!("{}: start", offset);
+                        assign!(cached_region, (self.is_start, offset) => 1.scalar())?;
+                        self.state_machine.start_config.assign_cached(
+                            &mut cached_region,
                             self,
                             &mut pv,
                             offset,
                             node,
                         )?;
                     } else if node.extension_branch.is_some() {
-                        //println!("{}: branch", offset);
-                        assign!(region, (self.is_branch, offset) => 1.scalar())?;
-                        self.state_machine.branch_config.assign(
-                            &mut region,
+                        let mut cached_region = CachedRegion::new(
+                            &mut region, 
+                            power_of_randomness,
+                            TOTAL_WIDTH,
+                            ExtensionBranchRowType::Count as usize, 
+                            0,
+                            offset,
+                        );
+                        println!("{}: branch", offset);
+                        assign!(cached_region, (self.is_branch, offset) => 1.scalar())?;
+                        self.state_machine.branch_config.assign_cached(
+                            &mut cached_region,
                             self,
                             &mut pv,
                             offset,
                             node,
                         )?;
                     } else if node.storage.is_some() {
-                        assign!(region, (self.is_storage, offset) => 1.scalar())?;
-                        //println!("{}: storage", offset);
-                        self.state_machine.storage_config.assign(
-                            &mut region,
+                        let mut cached_region = CachedRegion::new(
+                            &mut region, 
+                            power_of_randomness,
+                            TOTAL_WIDTH,
+                            StorageRowType::Count as usize, 
+                            0,
+                            offset,
+                        );
+                        assign!(cached_region, (self.is_storage, offset) => 1.scalar())?;
+                        println!("{}: storage", offset);
+                        self.state_machine.storage_config.assign_cached(
+                            &mut cached_region,
                             self,
                             &mut pv,
                             offset,
                             node,
                         )?;
                     } else if node.account.is_some() {
-                        assign!(region, (self.is_account, offset) => 1.scalar())?;
-                        //println!("{}: account", offset);
-                        self.state_machine.account_config.assign(
-                            &mut region,
+                        let mut cached_region = CachedRegion::new(
+                            &mut region, 
+                            power_of_randomness,
+                            TOTAL_WIDTH,
+                            AccountRowType::Count as usize, 
+                            0,
+                            offset,
+                        );
+                        assign!(cached_region, (self.is_account, offset) => 1.scalar())?;
+                        println!("{}: account", offset);
+                        self.state_machine.account_config.assign_cached(
+                            &mut cached_region,
                             self,
                             &mut pv,
                             offset,
@@ -786,7 +863,7 @@ impl<F: Field> MPTConfig<F> {
                         )?;
                     }
 
-                    //println!("height: {}", node.bytes.len());
+                    println!("height: {}", node.values.len());
                     offset += node.values.len();
                 }
 
@@ -794,8 +871,8 @@ impl<F: Field> MPTConfig<F> {
                 memory = pv.memory;
 
                 for offset in 0..height {
-                    assignf!(region, (self.q_enable, offset) => true.scalar())?;
-                    assignf!(region, (self.q_not_first, offset) => (offset != 0).scalar())?;
+                    // assignf!(region, (self.q_enable, offset) => true.scalar())?;
+                    assignf!(region, (self.q_not_first, offset) => (offset == 0).scalar())?;
                 }
 
                 Ok(())
@@ -807,6 +884,13 @@ impl<F: Field> MPTConfig<F> {
         Ok(())
     }
 
+    pub(crate) fn region_width(&self) -> usize {
+        self.mpt_table.columns().len() 
+            + self.main.bytes.len() 
+            + self.managed_columns.len() 
+            + self.memory.columns.len()
+    }
+
     fn load_fixed_table(
         &self,
         layouter: &mut impl Layouter<F>,
@@ -870,6 +954,93 @@ impl<F: Field> MPTConfig<F> {
                     offset += 1;
                 }
 
+                // Rlp prefixes table [rlp_tag, byte, is_string, is_short, is_verylong]
+                for ind in 0..=127 {
+                    // short string
+                    assignf!(region, (self.fixed_table[0], offset) => FixedTableTag::RLP.scalar())?;
+                    assignf!(region, (self.fixed_table[1], offset) => ind.scalar())?;
+                    assignf!(region, (self.fixed_table[2], offset) => true.scalar())?;
+                    assignf!(region, (self.fixed_table[3], offset) => true.scalar())?;
+                    assignf!(region, (self.fixed_table[4], offset) => false.scalar())?;
+                    offset += 1;
+                }
+                for ind in 128..=183 {
+                    // long string
+                    assignf!(region, (self.fixed_table[0], offset) => FixedTableTag::RLP.scalar())?;
+                    assignf!(region, (self.fixed_table[1], offset) => ind.scalar())?;
+                    assignf!(region, (self.fixed_table[2], offset) => true.scalar())?;
+                    assignf!(region, (self.fixed_table[3], offset) => false.scalar())?;
+                    assignf!(region, (self.fixed_table[4], offset) => false.scalar())?;
+                    offset += 1;
+                }
+                for ind in 184..=191 {
+                    // very long string
+                    assignf!(region, (self.fixed_table[0], offset) => FixedTableTag::RLP.scalar())?;
+                    assignf!(region, (self.fixed_table[1], offset) => ind.scalar())?;
+                    assignf!(region, (self.fixed_table[2], offset) => true.scalar())?;
+                    assignf!(region, (self.fixed_table[3], offset) => false.scalar())?;
+                    assignf!(region, (self.fixed_table[4], offset) => true.scalar())?;
+                    offset += 1;
+                }
+                for ind in 192..=247 {
+                    // short list
+                    assignf!(region, (self.fixed_table[0], offset) => FixedTableTag::RLP.scalar())?;
+                    assignf!(region, (self.fixed_table[1], offset) => ind.scalar())?;
+                    assignf!(region, (self.fixed_table[2], offset) => false.scalar())?;
+                    assignf!(region, (self.fixed_table[3], offset) => true.scalar())?;
+                    assignf!(region, (self.fixed_table[4], offset) => false.scalar())?;
+                    offset += 1;
+                }
+                // 248
+                // long list
+                assignf!(region, (self.fixed_table[0], offset) => FixedTableTag::RLP.scalar())?;
+                assignf!(region, (self.fixed_table[1], offset) => 248i32.scalar())?;
+                assignf!(region, (self.fixed_table[2], offset) => false.scalar())?;
+                assignf!(region, (self.fixed_table[3], offset) => false.scalar())?;
+                assignf!(region, (self.fixed_table[4], offset) => false.scalar())?;
+                offset += 1;
+                // 249
+                // very long list
+                assignf!(region, (self.fixed_table[0], offset) => FixedTableTag::RLP.scalar())?;
+                assignf!(region, (self.fixed_table[1], offset) => 249i32.scalar())?;
+                assignf!(region, (self.fixed_table[2], offset) => false.scalar())?;
+                assignf!(region, (self.fixed_table[3], offset) => false.scalar())?;
+                assignf!(region, (self.fixed_table[4], offset) => true.scalar())?;
+                offset += 1;
+
+                // Even - only the nibbles 0 0 are valid
+                assignf!(region, (self.fixed_table[0], offset) => FixedTableTag::ExtOddKey.scalar())?;
+                assignf!(region, (self.fixed_table[1], offset) => 0.scalar())?;
+                assignf!(region, (self.fixed_table[2], offset) => false.scalar())?;
+                offset += 1;
+
+                // Odd - First nibble is 1, the second nibble can be any value
+                for idx in 0..16 {
+                    assignf!(region, (self.fixed_table[0], offset) => FixedTableTag::ExtOddKey.scalar())?;
+                    assignf!(region, (self.fixed_table[1], offset) => ((0b1_0000) + idx).scalar())?;
+                    assignf!(region, (self.fixed_table[2], offset) => true.scalar())?;
+                    offset += 1;
+                }
+                
+                Ok(())
+            },
+        )
+    }
+
+    /// load_byte_table loads the byte table into the circuit
+    pub fn load_byte_table(&self, layouter: &mut impl Layouter<F>) -> Result<(), Error> {
+        layouter.assign_region(
+            || "byte table",
+            |mut region| {
+                for offset in 0..256 {
+                    region.assign_fixed(
+                        || "",
+                        self.byte_table[0],
+                        offset,
+                        || Value::known(F::from(offset as u64)),
+                    )?;
+                }
+
                 Ok(())
             },
         )
@@ -915,6 +1086,7 @@ impl<F: Field> Circuit<F> for MPTCircuit<F> {
         }
 
         config.load_fixed_table(&mut layouter, self.randomness)?;
+        config.load_byte_table(&mut layouter)?;
         config.assign(&mut layouter, &mut witness_rows, self.randomness)?;
 
         let challenges = Challenges::mock(Value::known(self.randomness));
@@ -934,11 +1106,14 @@ mod tests {
         dev::MockProver,
         halo2curves::{bn256::Fr, FieldExt},
     };
-
-    use std::fs;
+    use std::{fs, env::VarError};
 
     #[test]
     fn test_mpt() {
+        let only_run = var("ONLY_RUN")
+            .and_then(|idx| idx.parse::<usize>().map_err(|e|VarError::NotPresent)
+        ).ok();
+        println!("ONLY_RUN={:?}", only_run);
         // for debugging:
         let path = "src/mpt_circuit/tests";
         // let path = "tests";
@@ -954,31 +1129,64 @@ mod tests {
             })
             .enumerate()
             .for_each(|(idx, f)| {
-                let path = f.path();
-                let mut parts = path.to_str().unwrap().split('-');
-                parts.next();
-                let file = std::fs::File::open(path.clone());
-                let reader = std::io::BufReader::new(file.unwrap());
-                let w: Vec<Vec<u8>> = serde_json::from_reader(reader).unwrap();
-
-                let count = w.iter().filter(|r| r[r.len() - 1] != 5).count() * 2;
-                let randomness: Fr = 123456789.scalar();
-                let instance: Vec<Vec<Fr>> = (1..HASH_WIDTH + 1)
-                    .map(|exp| vec![randomness.pow(&[exp as u64, 0, 0, 0]); count])
-                    .collect();
-
-                let circuit = MPTCircuit::<Fr> {
-                    witness: w.clone(),
-                    randomness,
-                };
-
-                println!("{} {:?}", idx, path);
-                // let prover = MockProver::run(9, &circuit, vec![pub_root]).unwrap();
-                let num_rows = w.len() * 2;
-                let prover = MockProver::run(14 /* 9 */, &circuit, instance).unwrap();
-                assert_eq!(prover.verify_at_rows(0..num_rows, 0..num_rows,), Ok(()));
-                //assert_eq!(prover.verify_par(), Ok(()));
-                //prover.assert_satisfied();
+                let mut run = true;
+                if let Some(i) = only_run {
+                    if idx != i {run = false;} 
+                }
+                if run {
+                    let path = f.path();
+                    let mut parts = path.to_str().unwrap().split('-');
+                    parts.next();
+                    let file = std::fs::File::open(path.clone());
+                    let reader = std::io::BufReader::new(file.unwrap());
+                    let w: Vec<Vec<u8>> = serde_json::from_reader(reader).unwrap();
+    
+                    let count = w.iter().filter(|r| r[r.len() - 1] != 5).count() * 2;
+                    let randomness: Fr = 123456789.scalar();
+                    let instance: Vec<Vec<Fr>> = (1..HASH_WIDTH + 1)
+                        .map(|exp| vec![randomness.pow(&[exp as u64, 0, 0, 0]); count])
+                        .collect();
+    
+                    let circuit = MPTCircuit::<Fr> {
+                        witness: w.clone(),
+                        randomness,
+                    };
+    
+                    println!("{} {:?}", idx, path);
+                    // let prover = MockProver::run(9, &circuit, vec![pub_root]).unwrap();
+                    let num_rows = w.len() * 2;
+                    let prover = MockProver::run(14 /* 9 */, &circuit, instance).unwrap();
+                    assert_eq!(prover.verify_at_rows(0..num_rows, 0..num_rows,), Ok(()));
+                    //assert_eq!(prover.verify_par(), Ok(()));
+                    //prover.assert_satisfied();       
+                }
             });
     }
+
+
+    #[test]
+    fn test_mpt2() {
+        let wit = 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+        let w: Vec<Vec<u8>> = serde_json::from_str(wit).unwrap();
+
+        let count = w.iter().filter(|r| r[r.len() - 1] != 5).count() * 2;
+        let randomness: Fr = 123456789.scalar();
+        let instance: Vec<Vec<Fr>> = (1..HASH_WIDTH + 1)
+            .map(|exp| vec![randomness.pow(&[exp as u64, 0, 0, 0]); count])
+            .collect();
+
+        let circuit = MPTCircuit::<Fr> {
+            witness: w.clone(),
+            randomness,
+        };
+
+        // let prover = MockProver::run(9, &circuit, vec![pub_root]).unwrap();
+        let num_rows = w.len() * 2;
+        let prover = MockProver::run(14 /* 9 */, &circuit, instance).unwrap();
+        assert_eq!(prover.verify_at_rows(0..num_rows, 0..num_rows,), Ok(()));
+        //assert_eq!(prover.verify_par(), Ok(()));
+        //prover.assert_satisfied();       
+       
+                
+    }
 }
diff --git a/zkevm-circuits/src/mpt_circuit/account_leaf.rs b/zkevm-circuits/src/mpt_circuit/account_leaf.rs
index f0dab2a37b..2e8a3ae0a7 100644
--- a/zkevm-circuits/src/mpt_circuit/account_leaf.rs
+++ b/zkevm-circuits/src/mpt_circuit/account_leaf.rs
@@ -27,7 +27,7 @@ use crate::{
         param::{KEY_LEN_IN_NIBBLES, RLP_LIST_LONG, RLP_LONG},
         FixedTableTag,
     },
-    mpt_circuit::{MPTConfig, MPTState},
+    mpt_circuit::{MPTConfig, MPTState}, evm_circuit::util::CachedRegion,
 };
 use crate::{
     circuit_tools::constraint_builder::RLCChainable,
@@ -645,4 +645,257 @@ impl<F: Field> AccountLeafConfig<F> {
 
         Ok(())
     }
+
+    pub fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        ctx: &MPTConfig<F>,
+        pv: &mut MPTState<F>,
+        offset: usize,
+        node: &Node,
+    ) -> Result<(), Error> {
+        let account = &node.account.clone().unwrap();
+
+        let key_bytes = [
+            node.values[AccountRowType::KeyS as usize].clone(),
+            node.values[AccountRowType::KeyC as usize].clone(),
+        ];
+        let nonce_bytes = [
+            node.values[AccountRowType::NonceS as usize].clone(),
+            node.values[AccountRowType::NonceC as usize].clone(),
+        ];
+        let balance_bytes = [
+            node.values[AccountRowType::BalanceS as usize].clone(),
+            node.values[AccountRowType::BalanceC as usize].clone(),
+        ];
+        let storage_bytes = [
+            node.values[AccountRowType::StorageS as usize].clone(),
+            node.values[AccountRowType::StorageC as usize].clone(),
+        ];
+        let codehash_bytes = [
+            node.values[AccountRowType::CodehashS as usize].clone(),
+            node.values[AccountRowType::CodehashC as usize].clone(),
+        ];
+        let drifted_bytes = node.values[AccountRowType::Drifted as usize].clone();
+        let wrong_bytes = node.values[AccountRowType::Wrong as usize].clone();
+
+        let main_data =
+            self.main_data
+                .witness_load_cached(region, offset, &pv.memory[main_memory()], 0)?;
+
+        // Key
+        let mut key_rlc = vec![0.scalar(); 2];
+        let mut nonce_rlc = vec![0.scalar(); 2];
+        let mut balance_rlc = vec![0.scalar(); 2];
+        let mut storage_rlc = vec![0.scalar(); 2];
+        let mut codehash_rlc = vec![0.scalar(); 2];
+        let mut key_data = vec![KeyDataWitness::default(); 2];
+        let mut parent_data = vec![ParentDataWitness::default(); 2];
+        for is_s in [true, false] {
+            for (cell, byte) in self.value_rlp_bytes[is_s.idx()]
+                .iter()
+                .zip(account.value_rlp_bytes[is_s.idx()].iter())
+            {
+                cell.assign_cached(region, offset, byte.scalar())?;
+            }
+
+            key_data[is_s.idx()] = self.key_data[is_s.idx()].witness_load_cached(
+                region,
+                offset,
+                &mut pv.memory[key_memory(is_s)],
+                0,
+            )?;
+
+            parent_data[is_s.idx()] = self.parent_data[is_s.idx()].witness_load_cached(
+                region,
+                offset,
+                &mut pv.memory[parent_memory(is_s)],
+                0,
+            )?;
+
+            self.is_in_empty_trie[is_s.idx()].assign_cached(
+                region,
+                offset,
+                parent_data[is_s.idx()].rlc,
+                ctx.r,
+            )?;
+
+            let rlp_key_witness = self.rlp_key[is_s.idx()].assign_cached(
+                region,
+                offset,
+                &account.list_rlp_bytes[is_s.idx()],
+                &key_bytes[is_s.idx()],
+            )?;
+            let nonce_witness =
+                self.rlp_nonce[is_s.idx()].assign_cached(region, offset, &nonce_bytes[is_s.idx()])?;
+            let balance_witness =
+                self.rlp_balance[is_s.idx()].assign_cached(region, offset, &balance_bytes[is_s.idx()])?;
+            let storage_witness =
+                self.rlp_storage[is_s.idx()].assign_cached(region, offset, &storage_bytes[is_s.idx()])?;
+            let codehash_witness = self.rlp_codehash[is_s.idx()].assign_cached(
+                region,
+                offset,
+                &codehash_bytes[is_s.idx()],
+            )?;
+
+            nonce_rlc[is_s.idx()] = nonce_witness.rlc_value(ctx.r);
+            balance_rlc[is_s.idx()] = balance_witness.rlc_value(ctx.r);
+            storage_rlc[is_s.idx()] = storage_witness.rlc_value(ctx.r);
+            codehash_rlc[is_s.idx()] = codehash_witness.rlc_value(ctx.r);
+
+            // + 4 because of s_rlp1, s_rlp2, c_rlp1, c_rlp2
+            let mut mult_nonce = F::one();
+            for _ in 0..nonce_witness.num_bytes() + 4 {
+                mult_nonce *= ctx.r;
+            }
+            let mut mult_balance = F::one();
+            for _ in 0..balance_witness.num_bytes() {
+                mult_balance *= ctx.r;
+            }
+            self.nonce_mult[is_s.idx()].assign_cached(region, offset, mult_nonce)?;
+            self.balance_mult[is_s.idx()].assign_cached(region, offset, mult_balance)?;
+
+            // Key
+            (key_rlc[is_s.idx()], _) = rlp_key_witness.key.key(
+                rlp_key_witness.key_value.clone(),
+                key_data[is_s.idx()].rlc,
+                key_data[is_s.idx()].mult,
+                ctx.r,
+            );
+
+            let mut key_mult = F::one();
+            for _ in 0..rlp_key_witness.num_bytes_on_key_row() {
+                key_mult *= ctx.r;
+            }
+            self.key_mult[is_s.idx()].assign_cached(region, offset, key_mult)?;
+
+            // Update key and parent state
+            KeyData::witness_store_cached(
+                region,
+                offset,
+                &mut pv.memory[key_memory(is_s)],
+                F::zero(),
+                F::one(),
+                0,
+                false,
+                F::zero(),
+                F::one(),
+            )?;
+            ParentData::witness_store_cached(
+                region,
+                offset,
+                &mut pv.memory[parent_memory(is_s)],
+                storage_rlc[is_s.idx()],
+                true,
+                false,
+                storage_rlc[is_s.idx()],
+            )?;
+        }
+
+        // Anything following this node is below the account
+        MainData::witness_store_cached(
+            region,
+            offset,
+            &mut pv.memory[main_memory()],
+            main_data.proof_type,
+            true,
+            account.address.rlc_value(ctx.r),
+            main_data.root_prev,
+            main_data.root,
+        )?;
+
+        // Proof types
+        let is_non_existing_proof = self.is_non_existing_account_proof.assign_cached(
+            region,
+            offset,
+            main_data.proof_type.scalar(),
+            ProofType::AccountDoesNotExist.scalar(),
+        )? == true.scalar();
+        let is_account_delete_mod = self.is_account_delete_mod.assign_cached(
+            region,
+            offset,
+            main_data.proof_type.scalar(),
+            ProofType::AccountDestructed.scalar(),
+        )? == true.scalar();
+        let is_nonce_mod = self.is_nonce_mod.assign_cached(
+            region,
+            offset,
+            main_data.proof_type.scalar(),
+            ProofType::NonceChanged.scalar(),
+        )? == true.scalar();
+        let is_balance_mod = self.is_balance_mod.assign_cached(
+            region,
+            offset,
+            main_data.proof_type.scalar(),
+            ProofType::BalanceChanged.scalar(),
+        )? == true.scalar();
+        let is_storage_mod = self.is_storage_mod.assign_cached(
+            region,
+            offset,
+            main_data.proof_type.scalar(),
+            ProofType::StorageChanged.scalar(),
+        )? == true.scalar();
+        let is_codehash_mod = self.is_codehash_mod.assign_cached(
+            region,
+            offset,
+            main_data.proof_type.scalar(),
+            ProofType::CodeHashExists.scalar(),
+        )? == true.scalar();
+
+        // Drifted leaf handling
+        self.drifted.assign_cached(
+            region,
+            offset,
+            &parent_data,
+            &account.drifted_rlp_bytes,
+            &drifted_bytes,
+            ctx.r,
+        )?;
+
+        // Wrong leaf handling
+        self.wrong.assign_cached(
+            region,
+            offset,
+            is_non_existing_proof,
+            &key_rlc,
+            &account.wrong_rlp_bytes,
+            &wrong_bytes,
+            true,
+            key_data[true.idx()].clone(),
+            ctx.r,
+        )?;
+
+        // Put the data in the lookup table
+        let (proof_type, value) = if is_nonce_mod {
+            (ProofType::NonceChanged, nonce_rlc)
+        } else if is_balance_mod {
+            (ProofType::BalanceChanged, balance_rlc)
+        } else if is_storage_mod {
+            (ProofType::StorageChanged, storage_rlc)
+        } else if is_codehash_mod {
+            (ProofType::CodeHashExists, codehash_rlc)
+        } else if is_account_delete_mod {
+            (ProofType::AccountDestructed, vec![0.scalar(); 2])
+        } else if is_non_existing_proof {
+            (ProofType::AccountDoesNotExist, vec![0.scalar(); 2])
+        } else {
+            (ProofType::Disabled, vec![0.scalar(); 2])
+        };
+        ctx.mpt_table.assign_cached(
+            region,
+            offset,
+            &MptUpdateRow {
+                address_rlc: account.address.rlc_value(ctx.r),
+                proof_type: proof_type.scalar(),
+                key_rlc: 0.scalar(),
+                value_prev: value[true.idx()],
+                value: value[false.idx()],
+                root_prev: main_data.root_prev,
+                root: main_data.root,
+            },
+        )?;
+
+        Ok(())
+    }
+
 }
diff --git a/zkevm-circuits/src/mpt_circuit/branch.rs b/zkevm-circuits/src/mpt_circuit/branch.rs
index 5ff3904025..8287f0f63d 100644
--- a/zkevm-circuits/src/mpt_circuit/branch.rs
+++ b/zkevm-circuits/src/mpt_circuit/branch.rs
@@ -23,6 +23,7 @@ use crate::{
     mpt_circuit::{helpers::Indexable, param::RLP_NIL, FixedTableTag},
     mpt_circuit::{MPTConfig, MPTState},
 };
+use crate::evm_circuit::util::CachedRegion;
 
 #[derive(Clone, Debug)]
 pub(crate) struct BranchState<F> {
@@ -428,4 +429,128 @@ impl<F: Field> BranchGadget<F> {
             mod_node_hash_rlc,
         ))
     }
+
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        mpt_config: &MPTConfig<F>,
+        _pv: &mut MPTState<F>,
+        offset: usize,
+        is_placeholder: &[bool; 2],
+        key_rlc: &mut F,
+        key_mult: &mut F,
+        num_nibbles: &mut usize,
+        is_key_odd: &mut bool,
+        node: &Node,
+    ) -> Result<(F, F, F, [F; 2]), Error> {
+        let branch = &node.extension_branch.clone().unwrap().branch;
+
+        // Data
+        let child_bytes: [Vec<u8>; ARITY + 1] = array_init::array_init(|i| node.values[i].clone());
+
+        for is_s in [true, false] {
+            let rlp_list_witness = self.rlp_list[is_s.idx()].assign_cached(
+                region,
+                offset,
+                &branch.list_rlp_bytes[is_s.idx()],
+            )?;
+            self.is_not_hashed[is_s.idx()].assign_cached(
+                region,
+                offset,
+                rlp_list_witness.num_bytes().scalar(),
+                HASH_WIDTH.scalar(),
+            )?;
+        }
+
+        for node_index in 0..ARITY {
+            self.is_modified[node_index].assign_cached(
+                region,
+                offset,
+                (node_index == branch.modified_index).scalar(),
+            )?;
+            self.is_drifted[node_index].assign_cached(
+                region,
+                offset,
+                (node_index == branch.drifted_index).scalar(),
+            )?;
+        }
+
+        // Process the branch children
+        let mut child_witnesses = vec![RLPItemWitness::default(); ARITY + 1];
+        for node_index in 0..ARITY + 1 {
+            let child_witness =
+                self.children[node_index]
+                    .rlp
+                    .assign_cached(region, offset, &child_bytes[node_index])?;
+            child_witnesses[node_index] = child_witness.clone();
+
+            let mut node_mult_diff = F::one();
+            for _ in 0..child_witness.num_bytes() {
+                node_mult_diff *= mpt_config.r;
+            }
+
+            self.children[node_index]
+                .mult_diff
+                .assign_cached(region, offset, node_mult_diff)?;
+            self.children[node_index].rlc_branch.assign_cached(
+                region,
+                offset,
+                child_witness.rlc_branch(mpt_config.r),
+            )?;
+            self.children[node_index].rlc_rlp.assign_cached(
+                region,
+                offset,
+                child_witness.rlc_rlp(mpt_config.r),
+            )?;
+            let _is_hashed = self.children[node_index].is_hashed.assign_cached(
+                region,
+                offset,
+                child_witness.len().scalar(),
+                32.scalar(),
+            )?;
+        }
+
+        // one nibble is used for position in branch
+        *num_nibbles += 1;
+        // Update key parity
+        *is_key_odd = !*is_key_odd;
+
+        // Update the key RLC and multiplier for the branch nibble.
+        let (nibble_mult, mult): (F, F) = if *is_key_odd {
+            // The nibble will be added as the most significant nibble using the same
+            // multiplier
+            (16.scalar(), 1.scalar())
+        } else {
+            // The nibble will be added as the least significant nibble, the multiplier
+            // needs to advance
+            (1.scalar(), mpt_config.r)
+        };
+        let key_rlc_post_branch =
+            *key_rlc + F::from(branch.modified_index as u64) * nibble_mult * *key_mult;
+        let key_rlc_post_drifted =
+            *key_rlc + F::from(branch.drifted_index as u64) * nibble_mult * *key_mult;
+        let key_mult_post_branch = *key_mult * mult;
+
+        // Set the branch we'll take
+        let mut mod_node_hash_rlc = [0.scalar(); 2];
+        for is_s in [true, false] {
+            mod_node_hash_rlc[is_s.idx()] = if is_placeholder[is_s.idx()] {
+                child_witnesses[1 + branch.drifted_index].rlc_branch(mpt_config.r)
+            } else {
+                if is_s {
+                    child_witnesses[1 + branch.modified_index].rlc_branch(mpt_config.r)
+                } else {
+                    child_witnesses[0].rlc_branch(mpt_config.r)
+                }
+            };
+            self.mod_rlc[is_s.idx()].assign_cached(region, offset, mod_node_hash_rlc[is_s.idx()])?;
+        }
+
+        Ok((
+            key_rlc_post_branch,
+            key_rlc_post_drifted,
+            key_mult_post_branch,
+            mod_node_hash_rlc,
+        ))
+    }
 }
diff --git a/zkevm-circuits/src/mpt_circuit/extension.rs b/zkevm-circuits/src/mpt_circuit/extension.rs
index 67565f79f3..5169fb8fe0 100644
--- a/zkevm-circuits/src/mpt_circuit/extension.rs
+++ b/zkevm-circuits/src/mpt_circuit/extension.rs
@@ -21,6 +21,7 @@ use crate::{
     },
     mpt_circuit::{MPTConfig, MPTState},
 };
+use crate::evm_circuit::util::CachedRegion;
 
 #[derive(Clone, Debug)]
 pub(crate) struct ExtState<F> {
@@ -71,8 +72,15 @@ impl<F: Field> ExtensionGadget<F> {
 
             config.rlp_key = ListKeyGadget::construct(&mut cb.base, &key_bytes[0]);
             // TODO(Brecht): add lookup constraint
-            config.is_key_part_odd = cb.base.query_cell();
-
+            // let is_key_part_odd = key_bytes[0][rlp_key.key_value.num_rlp_bytes()] >> 4 == 1;
+            config.is_key_part_odd = cb.base.query_byte();
+            let odd_flag = matchx! {
+                config.rlp_key.key_value.is_short() => key_bytes[0][0].expr(),
+                config.rlp_key.key_value.is_long() => key_bytes[0][1].expr(),
+                config.rlp_key.key_value.is_very_long() => key_bytes[0][2].expr(),
+            };
+            require!((FixedTableTag::ExtOddKey.expr(), odd_flag, config.is_key_part_odd.expr()) => @"fixed");
+            
             // We need to check that the nibbles we stored in s are between 0 and 15.
             cb.set_range_s(FixedTableTag::RangeKeyLen16.expr());
 
@@ -277,4 +285,94 @@ impl<F: Field> ExtensionGadget<F> {
 
         Ok(())
     }
+
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        mpt_config: &MPTConfig<F>,
+        _pv: &mut MPTState<F>,
+        offset: usize,
+        key_data: &KeyDataWitness<F>,
+        key_rlc: &mut F,
+        key_mult: &mut F,
+        num_nibbles: &mut usize,
+        is_key_odd: &mut bool,
+        node: &Node,
+    ) -> Result<(), Error> {
+        let extension = &node.extension_branch.clone().unwrap().extension;
+
+        // Data
+        let key_bytes = [
+            node.values[ExtensionBranchRowType::KeyS as usize].clone(),
+            node.values[ExtensionBranchRowType::KeyC as usize].clone(),
+        ];
+        let value_bytes = [
+            node.values[ExtensionBranchRowType::ValueS as usize].clone(),
+            node.values[ExtensionBranchRowType::ValueC as usize].clone(),
+        ];
+
+        let rlp_key = self.rlp_key.assign_cached(
+            region,
+            offset,
+            &extension.list_rlp_bytes,
+            &key_bytes[true.idx()],
+        )?;
+
+        let mut ext_mult = F::one();
+        for _ in 0..rlp_key.num_bytes_on_key_row() {
+            ext_mult *= mpt_config.r;
+        }
+        self.mult.assign_cached(region, offset, ext_mult)?;
+
+        let is_key_part_odd = key_bytes[0][rlp_key.key_value.num_rlp_bytes()] >> 4 == 1;
+        self.is_key_part_odd
+            .assign_cached(region, offset, is_key_part_odd.scalar())?;
+
+        self.is_not_hashed.assign_cached(
+            region,
+            offset,
+            rlp_key.rlp_list.num_bytes().scalar(),
+            HASH_WIDTH.scalar(),
+        )?;
+
+        let mut key_len_mult = rlp_key.key_value.len();
+        if !(*is_key_odd && is_key_part_odd) {
+            key_len_mult -= 1;
+        }
+
+        // Update number of nibbles
+        *num_nibbles += num_nibbles::value(rlp_key.key_value.len(), is_key_part_odd);
+
+        // Update parity
+        *is_key_odd = if is_key_part_odd {
+            !*is_key_odd
+        } else {
+            *is_key_odd
+        };
+
+        // Key RLC
+        let (key_rlc_ext, _) = ext_key_rlc_calc_value(
+            rlp_key.key_value.clone(),
+            key_data.mult,
+            is_key_part_odd,
+            !*is_key_odd,
+            key_bytes.clone(),
+            mpt_config.r,
+        );
+        *key_rlc = key_data.rlc + key_rlc_ext;
+
+        // Key mult
+        let mut mult_key = 1.scalar();
+        for _ in 0..key_len_mult {
+            mult_key = mult_key * mpt_config.r;
+        }
+        self.mult_key.assign_cached(region, offset, mult_key)?;
+        *key_mult = key_data.mult * mult_key;
+
+        for is_s in [true, false] {
+            self.rlp_value[is_s.idx()].assign_cached(region, offset, &value_bytes[is_s.idx()])?;
+        }
+
+        Ok(())
+    }
 }
diff --git a/zkevm-circuits/src/mpt_circuit/extension_branch.rs b/zkevm-circuits/src/mpt_circuit/extension_branch.rs
index 9a8460c0ef..4f44e785bd 100644
--- a/zkevm-circuits/src/mpt_circuit/extension_branch.rs
+++ b/zkevm-circuits/src/mpt_circuit/extension_branch.rs
@@ -2,7 +2,7 @@ use eth_types::Field;
 use gadgets::util::Scalar;
 use halo2_proofs::{
     circuit::Region,
-    plonk::{Error, VirtualCells},
+    plonk::{Error, VirtualCells}, poly::Rotation,
 };
 
 use super::{
@@ -20,6 +20,7 @@ use crate::{
     mpt_circuit::witness_row::MptWitnessRow,
     mpt_circuit::{MPTConfig, MPTState},
 };
+use crate::evm_circuit::util::CachedRegion;
 
 #[derive(Clone, Debug, Default)]
 pub(crate) struct ExtensionBranchConfig<F> {
@@ -39,8 +40,8 @@ impl<F: Field> ExtensionBranchConfig<F> {
     ) -> Self {
         cb.base.cell_manager.as_mut().unwrap().reset();
         let mut config = ExtensionBranchConfig::default();
-
         circuit!([meta, cb.base], {
+            let q_enable = f!(ctx.q_enable);
             // General inputs
             config.is_extension = cb.base.query_bool();
             // If we're in a placeholder, both the extension and the branch parts are
@@ -65,6 +66,8 @@ impl<F: Field> ExtensionBranchConfig<F> {
                 require!(config.parent_data[is_s.idx()].is_placeholder => false);
             }
 
+            
+            // let cm1, cm2 = cm
             // Extension
             let (
                 num_nibbles,
@@ -76,6 +79,7 @@ impl<F: Field> ExtensionBranchConfig<F> {
                 parent_rlc_s,
                 parent_rlc_c,
             ) = ifx! {config.is_extension => {
+                //用 cm1
                 config.extension = ExtensionGadget::configure(
                     meta,
                     cb,
@@ -96,6 +100,7 @@ impl<F: Field> ExtensionBranchConfig<F> {
                     ext.branch_rlp_rlc[false.idx()].expr(),
                 )
             } elsex {
+                // 用 cm2
                 (
                     config.key_data.num_nibbles.expr(),
                     config.key_data.is_odd.expr(),
@@ -107,6 +112,7 @@ impl<F: Field> ExtensionBranchConfig<F> {
                     config.parent_data[false.idx()].rlc.expr(),
                 )
             }};
+            // cm = 实质上采取的 cmi
             let parent_rlc = [parent_rlc_s, parent_rlc_c];
             let is_root = [is_root_s, is_root_c];
 
@@ -252,7 +258,7 @@ impl<F: Field> ExtensionBranchConfig<F> {
                     region,
                     offset,
                     &mut pv.memory[key_memory(is_s)],
-                    key_rlc_post_branch,
+                    key_rlc_post_branch, //后面新算的
                     key_mult_post_branch,
                     num_nibbles,
                     false,
@@ -273,8 +279,8 @@ impl<F: Field> ExtensionBranchConfig<F> {
                     region,
                     offset,
                     &mut pv.memory[key_memory(is_s)],
-                    key_data.rlc,
-                    key_data.mult,
+                    key_data.rlc, 
+                    key_data.mult, //维持原样，相当于重新入栈
                     key_data.num_nibbles,
                     is_key_odd,
                     key_rlc_post_drifted,
@@ -294,4 +300,121 @@ impl<F: Field> ExtensionBranchConfig<F> {
 
         Ok(())
     }
+
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        mpt_config: &MPTConfig<F>,
+        pv: &mut MPTState<F>,
+        offset: usize,
+        node: &Node,
+    ) -> Result<(), Error> {
+        let extension_branch = &node.extension_branch.clone().unwrap();
+
+        self.is_extension
+            .assign_cached(region, offset, extension_branch.is_extension.scalar())?;
+
+        let key_data =
+            self.key_data
+                .witness_load_cached(region, offset, &pv.memory[key_memory(true)], 0)?;
+        let mut parent_data = vec![ParentDataWitness::default(); 2];
+        for is_s in [true, false] {
+            parent_data[is_s.idx()] = self.parent_data[is_s.idx()].witness_load_cached(
+                region,
+                offset,
+                &mut pv.memory[parent_memory(is_s)],
+                0,
+            )?;
+            self.is_placeholder[is_s.idx()].assign_cached(
+                region,
+                offset,
+                extension_branch.is_placeholder[is_s.idx()].scalar(),
+            )?;
+        }
+
+        let mut key_rlc = key_data.rlc;
+        let mut key_mult = key_data.mult;
+        let mut num_nibbles = key_data.num_nibbles;
+        let mut is_key_odd = key_data.is_odd;
+
+        // Extension
+        if extension_branch.is_extension {
+            self.extension.assign_cached(
+                region,
+                mpt_config,
+                pv,
+                offset,
+                &key_data,
+                &mut key_rlc,
+                &mut key_mult,
+                &mut num_nibbles,
+                &mut is_key_odd,
+                node,
+            )?;
+        }
+
+        // Branch
+        let (key_rlc_post_branch, key_rlc_post_drifted, key_mult_post_branch, mod_node_hash_rlc) =
+            self.branch.assign_cached(
+                region,
+                mpt_config,
+                pv,
+                offset,
+                &extension_branch.is_placeholder,
+                &mut key_rlc,
+                &mut key_mult,
+                &mut num_nibbles,
+                &mut is_key_odd,
+                node,
+            )?;
+
+        // Set the new parent and key
+        for is_s in [true, false] {
+            if !extension_branch.is_placeholder[is_s.idx()] {
+                KeyData::witness_store_cached(
+                    region,
+                    offset,
+                    &mut pv.memory[key_memory(is_s)],
+                    key_rlc_post_branch, //后面新算的
+                    key_mult_post_branch,
+                    num_nibbles,
+                    false,
+                    0.scalar(),
+                    0.scalar(),
+                )?;
+                ParentData::witness_store_cached(
+                    region,
+                    offset,
+                    &mut pv.memory[parent_memory(is_s)],
+                    mod_node_hash_rlc[is_s.idx()],
+                    false,
+                    false,
+                    0.scalar(),
+                )?;
+            } else {
+                KeyData::witness_store_cached(
+                    region,
+                    offset,
+                    &mut pv.memory[key_memory(is_s)],
+                    key_data.rlc, 
+                    key_data.mult, //维持原样，相当于重新入栈
+                    key_data.num_nibbles,
+                    is_key_odd,
+                    key_rlc_post_drifted,
+                    key_mult_post_branch,
+                )?;
+                ParentData::witness_store_cached(
+                    region,
+                    offset,
+                    &mut pv.memory[parent_memory(is_s)],
+                    parent_data[is_s.idx()].rlc,
+                    parent_data[is_s.idx()].is_root,
+                    true,
+                    mod_node_hash_rlc[is_s.idx()],
+                )?;
+            }
+        }
+
+        Ok(())
+    }
 }
diff --git a/zkevm-circuits/src/mpt_circuit/helpers.rs b/zkevm-circuits/src/mpt_circuit/helpers.rs
index a080939704..2542c08fad 100644
--- a/zkevm-circuits/src/mpt_circuit/helpers.rs
+++ b/zkevm-circuits/src/mpt_circuit/helpers.rs
@@ -3,7 +3,7 @@ use std::any::Any;
 use crate::{
     _cb, circuit,
     circuit_tools::{
-        cell_manager::{Cell, CellManager, Trackable},
+        cell_manager::{Cell, CellManager_, Trackable, CellType},
         constraint_builder::{
             Conditionable, ConstraintBuilder, RLCChainable, RLCChainableValue, RLCable,
             RLCableValue,
@@ -17,11 +17,13 @@ use crate::{
         rlp_gadgets::{get_ext_odd_nibble, get_terminal_odd_nibble},
     },
     util::Expr,
+    evm_circuit::util::{CachedRegion, rlc}, bytecode_circuit::param::HASH_WIDTH,
 };
 use eth_types::Field;
 use gadgets::util::{or, Scalar};
 use halo2_proofs::{
-    circuit::Region,
+    arithmetic::FieldExt,
+    circuit::{AssignedCell, Region, Value},
     plonk::{Error, Expression},
 };
 
@@ -30,8 +32,17 @@ use super::{
         get_ext_odd_nibble_value, RLPListGadget, RLPListWitness, RLPValueGadget, RLPValueWitness,
     },
     FixedTableTag,
+
+    table::Lookup,
 };
 
+// Max degree allowed in all expressions passing through the ConstraintBuilder.
+// It aims to cap `extended_k` to 2, which allows constraint degree to 2^2+1,
+// but each ExecutionGadget has implicit selector degree 3, so here it only
+// allows 2^2+1-3 = 2.
+const MAX_DEGREE: usize = 5;
+const IMPLICIT_DEGREE: usize = 3;
+
 /// Indexable object
 pub trait Indexable {
     /// Convert to index
@@ -115,6 +126,24 @@ impl<F: Field> LeafKeyGadget<F> {
             has_no_nibble: has_no_nibble != 0.scalar(),
         })
     }
+
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        rlp_key: RLPValueWitness,
+    ) -> Result<LeafKeyWitness, Error> {
+        let has_no_nibble = self.has_no_nibbles.assign_cached(
+            region,
+            offset,
+            F::from(rlp_key.bytes[0] as u64),
+            F::from(KEY_TERMINAL_PREFIX_EVEN as u64),
+        )?;
+        Ok(LeafKeyWitness {
+            has_no_nibble: has_no_nibble != 0.scalar(),
+        })
+    }
+
 }
 
 impl LeafKeyWitness {
@@ -294,6 +323,27 @@ impl<F: Field> ListKeyGadget<F> {
         })
     }
 
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        list_bytes: &[u8],
+        bytes: &[u8],
+    ) -> Result<ListKeyWitness, Error> {
+        for (cell, byte) in self.rlp_list_bytes.iter().zip(list_bytes.iter()) {
+            cell.assign_cached(region, offset, byte.scalar())?;
+        }
+        let rlp_list = self.rlp_list.assign_cached(region, offset, list_bytes)?;
+        let key_value = self.key_value.assign_cached(region, offset, bytes)?;
+        let key = self.key.assign_cached(region, offset, key_value.clone())?;
+
+        Ok(ListKeyWitness {
+            rlp_list,
+            key_value,
+            key,
+        })
+    }
+
     pub(crate) fn rlc(&self, r: &[Expression<F>]) -> Expression<F> {
         self.rlp_list
             .rlc_rlp_only(&r)
@@ -442,6 +492,31 @@ impl<F: Field> KeyData<F> {
 
         Ok(())
     }
+    
+    pub(crate) fn witness_store_cached(
+        _region: &mut CachedRegion<F>,
+        offset: usize,
+        memory: &mut MemoryBank<F>,
+        rlc: F,
+        mult: F,
+        num_nibbles: usize,
+        placeholder_is_odd: bool,
+        parent_rlc: F,
+        parent_mult: F,
+    ) -> Result<(), Error> {
+        let values = [
+            rlc,
+            mult,
+            num_nibbles.scalar(),
+            (num_nibbles % 2 == 1).scalar(),
+            placeholder_is_odd.scalar(),
+            parent_rlc,
+            parent_mult,
+        ];
+        memory.witness_store(offset, &values);
+
+        Ok(())
+    }
 
     pub(crate) fn witness_load(
         &self,
@@ -470,6 +545,35 @@ impl<F: Field> KeyData<F> {
             drifted_mult: values[6],
         })
     }
+
+    pub(crate) fn witness_load_cached(
+        &self,
+        region:  &mut CachedRegion<F>,
+        offset: usize,
+        memory: &MemoryBank<F>,
+        load_offset: usize,
+    ) -> Result<KeyDataWitness<F>, Error> {
+        let values = memory.witness_load(load_offset);
+
+        self.rlc.assign_cached(region, offset, values[0])?;
+        self.mult.assign_cached(region, offset, values[1])?;
+        self.num_nibbles.assign_cached(region, offset, values[2])?;
+        self.is_odd.assign_cached(region, offset, values[3])?;
+        self.drifted_is_odd.assign_cached(region, offset, values[4])?;
+        self.drifted_rlc.assign_cached(region, offset, values[5])?;
+        self.drifted_mult.assign_cached(region, offset, values[6])?;
+
+        Ok(KeyDataWitness {
+            rlc: values[0],
+            mult: values[1],
+            num_nibbles: values[2].get_lower_32() as usize,
+            is_odd: values[3] != F::zero(),
+            drifted_is_odd: values[4] != F::zero(),
+            drifted_rlc: values[5],
+            drifted_mult: values[6],
+        })
+    }
+
 }
 
 #[derive(Clone, Debug, Default)]
@@ -545,6 +649,26 @@ impl<F: Field> ParentData<F> {
         Ok(())
     }
 
+    pub(crate) fn witness_store_cached(
+        _region: &mut CachedRegion<F>,
+        offset: usize,
+        memory: &mut MemoryBank<F>,
+        rlc: F,
+        force_hashed: bool,
+        is_placeholder: bool,
+        placeholder_rlc: F,
+    ) -> Result<(), Error> {
+        let values = [
+            rlc,
+            force_hashed.scalar(),
+            is_placeholder.scalar(),
+            placeholder_rlc,
+        ];
+        memory.witness_store(offset, &values);
+
+        Ok(())
+    }
+
     pub(crate) fn witness_load(
         &self,
         region: &mut Region<'_, F>,
@@ -566,6 +690,28 @@ impl<F: Field> ParentData<F> {
             placeholder_rlc: values[3],
         })
     }
+
+    pub(crate) fn witness_load_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        memory: &MemoryBank<F>,
+        load_offset: usize,
+    ) -> Result<ParentDataWitness<F>, Error> {
+        let values = memory.witness_load(load_offset);
+
+        self.rlc.assign_cached(region, offset, values[0])?;
+        self.is_root.assign_cached(region, offset, values[1])?;
+        self.is_placeholder.assign_cached(region, offset, values[2])?;
+        self.placeholder_rlc.assign_cached(region, offset, values[3])?;
+
+        Ok(ParentDataWitness {
+            rlc: values[0],
+            is_root: values[1] == 1.scalar(),
+            is_placeholder: values[2] == 1.scalar(),
+            placeholder_rlc: values[3],
+        })
+    }
 }
 
 #[derive(Clone, Debug, Default)]
@@ -647,6 +793,28 @@ impl<F: Field> MainData<F> {
         Ok(())
     }
 
+    pub(crate) fn witness_store_cached(
+        _region:  &mut CachedRegion<F>,
+        offset: usize,
+        memory: &mut MemoryBank<F>,
+        proof_type: usize,
+        is_below_account: bool,
+        address_rlc: F,
+        root_prev: F,
+        root: F,
+    ) -> Result<(), Error> {
+        let values = [
+            proof_type.scalar(),
+            is_below_account.scalar(),
+            address_rlc,
+            root_prev,
+            root,
+        ];
+        memory.witness_store(offset, &values);
+
+        Ok(())
+    }
+
     pub(crate) fn witness_load(
         &self,
         region: &mut Region<'_, F>,
@@ -670,6 +838,31 @@ impl<F: Field> MainData<F> {
             root: values[4],
         })
     }
+
+    pub(crate) fn witness_load_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        memory: &MemoryBank<F>,
+        load_offset: usize,
+    ) -> Result<MainDataWitness<F>, Error> {
+        let values = memory.witness_load(load_offset);
+
+        self.proof_type.assign_cached(region, offset, values[0])?;
+        self.is_below_account.assign_cached(region, offset, values[1])?;
+        self.address_rlc.assign_cached(region, offset, values[2])?;
+        self.root_prev.assign_cached(region, offset, values[3])?;
+        self.root.assign_cached(region, offset, values[4])?;
+
+        Ok(MainDataWitness {
+            proof_type: values[0].get_lower_32() as usize,
+            is_below_account: values[1] == 1.scalar(),
+            address_rlc: values[2],
+            root_prev: values[3],
+            root: values[4],
+        })
+    }
+
 }
 
 /// Add the nibble from the drifted branch
@@ -819,6 +1012,51 @@ pub struct MPTConstraintBuilder<F> {
     pub length_c: Vec<(Expression<F>, Expression<F>)>,
     /// The range to check in s bytes
     pub range_s: Vec<(Expression<F>, Expression<F>)>,
+    /// Store expression over max degree
+    pub stored_expressions: Vec<StoredExpression<F>>,
+    /// Store randomness over max degree
+    power_of_randomness: [Expression<F>; HASH_WIDTH],
+}
+
+#[derive(Debug, Clone)]
+pub struct StoredExpression<F> {
+    pub(crate) name: String,
+    cell: Cell<F>,
+    cell_type: CellType,
+    expr: Expression<F>,
+    expr_id: String,
+}
+
+impl<F: Field> StoredExpression<F> {
+    pub fn assign(
+        &self,
+        region: &mut CachedRegion<'_, '_, F>,
+        offset: usize,
+    ) -> Result<AssignedCell<F, F>, Error> {
+        let value = self.expr.evaluate(
+            &|scalar| scalar,
+            &|_| unimplemented!("selector column"),
+            &|fixed_query| {
+                region.get_fixed(offset, fixed_query.column_index(), fixed_query.rotation())
+            },
+            &|advide_query| {
+                region.get_advice(offset, advide_query.column_index(), advide_query.rotation())
+            },
+            &|instance_query| {
+                region.get_instance(
+                    offset,
+                    instance_query.column_index(),
+                    instance_query.rotation(),
+                )
+            },
+            &|_| unimplemented!(),
+            &|a| -a,
+            &|a, b| a + b,
+            &|a, b| a * b,
+            &|a, scalar| a * scalar,
+        );
+        self.cell.assign_cached(region, offset, value)
+    }
 }
 
 /// Length is set in the configuration of the rows where unused columns might
@@ -832,13 +1070,19 @@ impl<F: Field> MPTConstraintBuilder<F> {
     const NUM_BYTES_SKIP: usize = 2; // RLP bytes never need to be zero checked
     const DEFAULT_RANGE: FixedTableTag = FixedTableTag::RangeKeyLen256;
 
-    pub(crate) fn new(max_degree: usize, cell_manager: Option<CellManager<F>>) -> Self {
+    pub(crate) fn new(
+        max_degree: usize, 
+        cell_manager: Option<CellManager_<F>>,
+        power_of_randomness: [Expression<F>; HASH_WIDTH],
+    ) -> Self {
         MPTConstraintBuilder {
             base: ConstraintBuilder::new(max_degree, cell_manager),
             length_s: Vec::new(),
             length_sc: 0.expr(),
             length_c: Vec::new(),
             range_s: Vec::new(),
+            stored_expressions: Vec::new(),
+            power_of_randomness
         }
     }
 
@@ -887,6 +1131,151 @@ impl<F: Field> MPTConstraintBuilder<F> {
     pub(crate) fn get_range_s(&self) -> Expression<F> {
         Self::DEFAULT_RANGE.expr() - self.range_s.apply_conditions()
     }
+
+    pub(crate) fn query_cell_with_type(&mut self, cell_type: CellType) -> Cell<F> {
+        self.query_cells(cell_type, 1).first().unwrap().clone()
+    }
+
+    fn query_cells(&mut self, cell_type: CellType, count: usize) -> Vec<Cell<F>> {
+        self.base.cell_manager.clone().unwrap().query_cells(cell_type, count)
+    }
+
+    pub(crate) fn add_constraint(&mut self, name: &'static str, constraint: Expression<F>) {
+        let constraint = self.split_expression(
+            name,
+            constraint * self.base.get_condition_expr(),
+            MAX_DEGREE - IMPLICIT_DEGREE,
+        );
+
+        self.validate_degree(constraint.degree(), name);
+        self.base.add_constraint(name, constraint);
+    }
+
+    pub(crate) fn validate_degree(&self, degree: usize, name: &'static str) {
+        // We need to subtract IMPLICIT_DEGREE from MAX_DEGREE because all expressions
+        // will be multiplied by state selector and q_step/q_step_first
+        // selector.
+        debug_assert!(
+            degree <= MAX_DEGREE - IMPLICIT_DEGREE,
+            "Expression {} degree too high: {} > {}",
+            name,
+            degree,
+            MAX_DEGREE - IMPLICIT_DEGREE,
+        );
+    }
+    
+    pub(crate) fn add_lookup(&mut self, name: &str, lookup: Lookup<F>) {
+        let lookup = match self.base.get_condition() {
+            Some(condition) => lookup.conditional(condition),
+            None => lookup,
+        };
+        let compressed_expr = self.split_expression(
+            "Lookup compression",
+            rlc::expr(&lookup.input_exprs(), &self.power_of_randomness),
+            MAX_DEGREE - IMPLICIT_DEGREE,
+        );
+        self.store_expression(name, compressed_expr, CellType::Lookup(lookup.table()));
+    }
+
+    pub(crate) fn store_expression(
+        &mut self,
+        name: &str,
+        expr: Expression<F>,
+        cell_type: CellType,
+    ) -> Expression<F> {
+        // Check if we already stored the expression somewhere
+        let stored_expression = self.find_stored_expression(expr.clone(), cell_type);
+        match stored_expression {
+            Some(stored_expression) => {
+                debug_assert!(
+                    !matches!(cell_type, CellType::Lookup(_)),
+                    "The same lookup is done multiple times",
+                );
+                stored_expression.cell.expr()
+            }
+            None => {
+                // Even if we're building expressions for the next step,
+                // these intermediate values need to be stored in the current step.
+                // let in_next_step = self.in_next_step;
+                // self.in_next_step = false;
+                let cell = self.query_cell_with_type(cell_type);
+                // self.in_next_step = in_next_step;
+
+                // Require the stored value to equal the value of the expression
+                let name = format!("{} (stored expression)", name);
+                self.base.add_constraint(
+                    Box::leak(name.clone().into_boxed_str()),
+                    cell.expr() - expr.clone(),
+                );
+
+                self.stored_expressions.push(StoredExpression {
+                    name,
+                    cell: cell.clone(),
+                    cell_type,
+                    expr_id: expr.identifier(),
+                    expr,
+                });
+                cell.expr()
+            }
+        }
+    }
+
+    pub(crate) fn find_stored_expression(
+        &self,
+        expr: Expression<F>,
+        cell_type: CellType,
+    ) -> Option<&StoredExpression<F>> {
+        let expr_id = expr.identifier();
+        self.stored_expressions
+            .iter()
+            .find(|&e| e.cell_type == cell_type && e.expr_id == expr_id)
+    }
+
+    fn split_expression(
+        &mut self,
+        name: &'static str,
+        expr: Expression<F>,
+        max_degree: usize,
+    ) -> Expression<F> {
+        if expr.degree() > max_degree {
+            match expr {
+                Expression::Negated(poly) => {
+                    Expression::Negated(Box::new(self.split_expression(name, *poly, max_degree)))
+                }
+                Expression::Scaled(poly, v) => {
+                    Expression::Scaled(Box::new(self.split_expression(name, *poly, max_degree)), v)
+                }
+                Expression::Sum(a, b) => {
+                    let a = self.split_expression(name, *a, max_degree);
+                    let b = self.split_expression(name, *b, max_degree);
+                    a + b
+                }
+                Expression::Product(a, b) => {
+                    let (mut a, mut b) = (*a, *b);
+                    while a.degree() + b.degree() > max_degree {
+                        let mut split = |expr: Expression<F>| {
+                            if expr.degree() > max_degree {
+                                self.split_expression(name, expr, max_degree)
+                            } else {
+                                self.store_expression(name, expr, CellType::Storage)
+                            }
+                        };
+                        if a.degree() >= b.degree() {
+                            a = split(a);
+                        } else {
+                            b = split(b);
+                        }
+                    }
+                    a * b
+                }
+                _ => expr.clone(),
+            }
+        } else {
+            expr.clone()
+        }
+    }
+
+
 }
 
 /// Returns `1` when `value == 0`, and returns `0` otherwise.
@@ -936,6 +1325,21 @@ impl<F: Field> IsEmptyTreeGadget<F> {
             .assign(region, offset, parent_rlc, 0.scalar())?;
         Ok(())
     }
+
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        parent_rlc: F,
+        r: F,
+    ) -> Result<(), Error> {
+        self.is_in_empty_trie
+            .assign_cached(region, offset, parent_rlc, EMPTY_TRIE_HASH.rlc_value(r))?;
+        self.is_in_empty_branch
+            .assign_cached(region, offset, parent_rlc, 0.scalar())?;
+        Ok(())
+    }
+
 }
 
 /// Handles drifted leaves
@@ -1014,6 +1418,26 @@ impl<F: Field> DriftedGadget<F> {
         }
         Ok(())
     }
+
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        parent_data: &[ParentDataWitness<F>],
+        drifted_list_bytes: &[u8],
+        drifted_bytes: &[u8],
+        r: F,
+    ) -> Result<(), Error> {
+        if parent_data[true.idx()].is_placeholder || parent_data[false.idx()].is_placeholder {
+            let drifted_key_witness =
+                self.drifted_rlp_key
+                    .assign_cached(region, offset, drifted_list_bytes, drifted_bytes)?;
+            let (_, leaf_mult) = drifted_key_witness.rlc_leaf(r);
+            self.drifted_mult.assign_cached(region, offset, leaf_mult)?;
+        }
+        Ok(())
+    }
+
 }
 
 /// Handles wrong leaves
@@ -1103,4 +1527,40 @@ impl<F: Field> WrongGadget<F> {
             Ok(key_rlc[for_placeholder_s.idx()])
         }
     }
+
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        is_non_existing: bool,
+        key_rlc: &[F],
+        list_bytes: &[u8],
+        wrong_bytes: &[u8],
+        for_placeholder_s: bool,
+        key_data: KeyDataWitness<F>,
+        r: F,
+    ) -> Result<F, Error> {
+        if is_non_existing {
+            let wrong_witness =
+                self.wrong_rlp_key
+                    .assign_cached(region, offset, list_bytes, wrong_bytes)?;
+            let (key_rlc_wrong, _) = wrong_witness.key.key(
+                wrong_witness.key_value.clone(),
+                key_data.rlc,
+                key_data.mult,
+                r,
+            );
+
+            self.is_key_equal.assign_cached(
+                region,
+                offset,
+                key_rlc[for_placeholder_s.idx()],
+                key_rlc_wrong,
+            )?;
+            Ok(key_rlc_wrong)
+        } else {
+            Ok(key_rlc[for_placeholder_s.idx()])
+        }
+    }
+
 }
diff --git a/zkevm-circuits/src/mpt_circuit/param.rs b/zkevm-circuits/src/mpt_circuit/param.rs
index 35e7d1bdde..5b444d255e 100644
--- a/zkevm-circuits/src/mpt_circuit/param.rs
+++ b/zkevm-circuits/src/mpt_circuit/param.rs
@@ -143,8 +143,11 @@ pub const RLP_HASH_VALUE: u8 = 128 + 32; //  0x80
 pub const KEY_LEN: usize = 32;
 pub const KEY_LEN_IN_NIBBLES: usize = KEY_LEN * 2;
 
+
 // Empty trie
 pub const EMPTY_TRIE_HASH: [u8; 32] = [
     86, 232, 31, 23, 27, 204, 85, 166, 255, 131, 69, 230, 146, 192, 248, 110, 91, 72, 224, 27, 153,
     108, 173, 192, 1, 98, 47, 181, 227, 99, 180, 33,
 ];
+
+pub const TOTAL_WIDTH: usize = 76;
\ No newline at end of file
diff --git a/zkevm-circuits/src/mpt_circuit/rlp_gadgets.rs b/zkevm-circuits/src/mpt_circuit/rlp_gadgets.rs
index 95e41fd220..2150e603f5 100644
--- a/zkevm-circuits/src/mpt_circuit/rlp_gadgets.rs
+++ b/zkevm-circuits/src/mpt_circuit/rlp_gadgets.rs
@@ -4,14 +4,17 @@ use crate::{
         cell_manager::Cell,
         constraint_builder::{ConstraintBuilder, RLCable, RLCableValue},
     },
-    matchr, matchw,
-    mpt_circuit::param::{RLP_LIST_LONG, RLP_LIST_SHORT, RLP_SHORT},
-    util::Expr,
+    matchr, matchw, 
+    mpt_circuit::{
+        FixedTableTag,
+        param::{RLP_LIST_LONG, RLP_LIST_SHORT, RLP_SHORT}
+    },
+    util::Expr, evm_circuit::util::CachedRegion,
 };
 use eth_types::Field;
 use gadgets::util::{not, Scalar};
 use halo2_proofs::{
-    circuit::Region,
+    circuit::{Region, self},
     plonk::{Error, Expression},
 };
 
@@ -37,12 +40,26 @@ pub(crate) struct RLPListWitness {
 
 impl<F: Field> RLPListGadget<F> {
     pub(crate) fn construct(cb: &mut ConstraintBuilder<F>, bytes: &[Expression<F>]) -> Self {
-        // TODO(Brecht): add lookup/LtGadget
+        let is_short = cb.query_cell();
+        let is_long =  cb.query_cell();
+        let is_very_long = cb.query_cell();
+        let is_string = cb.query_cell();
+        
+        circuit!([meta, cb], {
+            require!(vec![
+                FixedTableTag::RLP.expr(), 
+                bytes[0].clone(), 
+                is_string.expr(), 
+                is_short.expr(), 
+                is_very_long.expr()] => @"fixed"
+            );
+        });
+
         RLPListGadget {
-            is_short: cb.query_cell(),
-            is_long: cb.query_cell(),
-            is_very_long: cb.query_cell(),
-            is_string: cb.query_cell(),
+            is_short,
+            is_long,
+            is_very_long,
+            is_string,
             bytes: bytes.to_vec(),
         }
     }
@@ -61,8 +78,11 @@ impl<F: Field> RLPListGadget<F> {
         let mut is_very_long = false;
         let mut is_string = false;
         match bytes[0] {
+            // 192 - 247
             RLP_LIST_SHORT..=RLP_LIST_LONG => is_short = true,
+            // 248
             RLP_LIST_LONG_1 => is_long = true,
+            // 249
             RLP_LIST_LONG_2 => is_very_long = true,
             _ => is_string = true,
         }
@@ -82,6 +102,45 @@ impl<F: Field> RLPListGadget<F> {
         })
     }
 
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        bytes: &[u8],
+    ) -> Result<RLPListWitness, Error> {
+        const RLP_LIST_LONG_1: u8 = RLP_LIST_LONG + 1;
+        const RLP_LIST_LONG_2: u8 = RLP_LIST_LONG + 2;
+
+        let mut is_short = false;
+        let mut is_long = false;
+        let mut is_very_long = false;
+        let mut is_string = false;
+        match bytes[0] {
+            // 192 - 247
+            RLP_LIST_SHORT..=RLP_LIST_LONG => is_short = true,
+            // 248
+            RLP_LIST_LONG_1 => is_long = true,
+            // 249
+            RLP_LIST_LONG_2 => is_very_long = true,
+            _ => is_string = true,
+        }
+
+        self.is_short.assign_cached(region, offset, F::from(is_short))?;
+        self.is_long.assign_cached(region, offset, F::from(is_long))?;
+        self.is_very_long
+            .assign_cached(region, offset, F::from(is_very_long))?;
+        self.is_string.assign_cached(region, offset, F::from(is_string))?;
+
+        Ok(RLPListWitness {
+            is_short,
+            is_long,
+            is_very_long,
+            is_string,
+            bytes: bytes.to_vec(),
+        })
+    }
+
+
     // Single RLP byte, length at most 55 bytes
     pub(crate) fn is_list(&self) -> Expression<F> {
         not::expr(self.is_string.expr())
@@ -236,6 +295,20 @@ impl<F: Field> RLPListDataGadget<F> {
         self.rlp_list.assign(region, offset, list_bytes)
     }
 
+
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        list_bytes: &[u8],
+    ) -> Result<RLPListWitness, Error> {
+        for (cell, byte) in self.rlp_list_bytes.iter().zip(list_bytes.iter()) {
+            cell.assign_cached(region, offset, byte.scalar())?;
+        }
+        self.rlp_list.assign_cached(region, offset, list_bytes)
+    }
+
+
     pub(crate) fn rlc_rlp(&self, r: &[Expression<F>]) -> (Expression<F>, Expression<F>) {
         self.rlp_list.rlc_rlp_only(&r)
     }
@@ -261,12 +334,26 @@ pub(crate) struct RLPValueWitness {
 
 impl<F: Field> RLPValueGadget<F> {
     pub(crate) fn construct(cb: &mut ConstraintBuilder<F>, bytes: &[Expression<F>]) -> Self {
-        // TODO(Brecht): add lookup
+        let is_short = cb.query_cell();
+        let is_long =  cb.query_cell();
+        let is_very_long = cb.query_cell();
+        let is_list = cb.query_cell();
+        
+        circuit!([meta, cb], {
+            require!(vec![
+                FixedTableTag::RLP.expr(), 
+                bytes[0].clone(), 
+                not::expr(is_list.expr()), 
+                is_short.expr(), 
+                is_very_long.expr()] => @"fixed"
+            );
+        });
+
         RLPValueGadget {
-            is_short: cb.query_cell(),
-            is_long: cb.query_cell(),
-            is_very_long: cb.query_cell(),
-            is_list: cb.query_cell(),
+            is_short,
+            is_long,
+            is_very_long,
+            is_list,
             bytes: bytes.to_vec(),
         }
     }
@@ -286,8 +373,11 @@ impl<F: Field> RLPValueGadget<F> {
         let mut is_very_long = false;
         let mut is_list = false;
         match bytes[0] {
+            // 0 - 127
             0..=RLP_SHORT_INCLUSIVE => is_short = true,
+            // 128 - 183
             RLP_SHORT..=RLP_LONG => is_long = true,
+            // 189 - 191
             RLP_LONG_EXCLUSIVE..=RLP_VALUE_MAX => is_very_long = true,
             _ => is_list = true,
         }
@@ -307,6 +397,46 @@ impl<F: Field> RLPValueGadget<F> {
         })
     }
 
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        bytes: &[u8],
+    ) -> Result<RLPValueWitness, Error> {
+        const RLP_SHORT_INCLUSIVE: u8 = RLP_SHORT - 1;
+        const RLP_LONG_EXCLUSIVE: u8 = RLP_LONG + 1;
+        const RLP_VALUE_MAX: u8 = RLP_LIST_SHORT - 1;
+
+        let mut is_short = false;
+        let mut is_long = false;
+        let mut is_very_long = false;
+        let mut is_list = false;
+        match bytes[0] {
+            // 0 - 127
+            0..=RLP_SHORT_INCLUSIVE => is_short = true,
+            // 128 - 183
+            RLP_SHORT..=RLP_LONG => is_long = true,
+            // 189 - 191
+            RLP_LONG_EXCLUSIVE..=RLP_VALUE_MAX => is_very_long = true,
+            _ => is_list = true,
+        }
+
+        self.is_short.assign_cached(region, offset, F::from(is_short))?;
+        self.is_long.assign_cached(region, offset, F::from(is_long))?;
+        self.is_very_long
+            .assign_cached(region, offset, F::from(is_very_long))?;
+        self.is_list.assign_cached(region, offset, F::from(is_list))?;
+
+        Ok(RLPValueWitness {
+            is_short,
+            is_long,
+            is_very_long,
+            is_list,
+            bytes: bytes.to_vec(),
+        })
+    }
+
+
     // Returns true if this is indeed a string RLP
     pub(crate) fn is_string(&self) -> Expression<F> {
         not::expr(self.is_list.expr())
@@ -578,6 +708,24 @@ impl<F: Field> RLPItemGadget<F> {
         })
     }
 
+    pub(crate) fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        bytes: &[u8],
+    ) -> Result<RLPItemWitness, Error> {
+        let value_witness = self.value.assign_cached(region, offset, bytes)?;
+        let list_witness = self.list.assign_cached(region, offset, bytes)?;
+        assert!(!(value_witness.is_string() && list_witness.is_list()));
+
+        Ok(RLPItemWitness {
+            value: value_witness,
+            list: list_witness,
+            bytes: bytes.to_vec(),
+        })
+    }
+
+
     // Single RLP byte containing the byte value
     pub(crate) fn is_short(&self) -> Expression<F> {
         circuit!([meta, _cb!()], {
diff --git a/zkevm-circuits/src/mpt_circuit/start.rs b/zkevm-circuits/src/mpt_circuit/start.rs
index b4b43bd1d0..5b0775ab80 100644
--- a/zkevm-circuits/src/mpt_circuit/start.rs
+++ b/zkevm-circuits/src/mpt_circuit/start.rs
@@ -2,6 +2,7 @@ use super::helpers::Indexable;
 use super::witness_row::{Node, StartRowType};
 use crate::circuit_tools::cell_manager::Cell;
 use crate::circuit_tools::constraint_builder::{RLCable, RLCableValue};
+use crate::evm_circuit::util::CachedRegion;
 use crate::mpt_circuit::helpers::{main_memory, MainData};
 use crate::{
     circuit,
@@ -138,4 +139,65 @@ impl<F: Field> StartConfig<F> {
 
         Ok(())
     }
+
+    pub fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        ctx: &MPTConfig<F>,
+        pv: &mut MPTState<F>,
+        offset: usize,
+        node: &Node,
+    ) -> Result<(), Error> {
+        let start = &node.start.clone().unwrap();
+
+        let root_bytes = [
+            node.values[StartRowType::RootS as usize].clone(),
+            node.values[StartRowType::RootC as usize].clone(),
+        ];
+
+        self.proof_type
+            .assign_cached(region, offset, start.proof_type.scalar())?;
+
+        let mut root = vec![0.scalar(); 2];
+        for is_s in [true, false] {
+            root[is_s.idx()] = root_bytes[is_s.idx()].rlc_value(ctx.r);
+        }
+
+        MainData::witness_store_cached(
+            region,
+            offset,
+            &mut pv.memory[main_memory()],
+            start.proof_type as usize,
+            false,
+            0.scalar(),
+            root[true.idx()],
+            root[false.idx()],
+        )?;
+
+        for is_s in [true, false] {
+            ParentData::witness_store_cached(
+                region,
+                offset,
+                &mut pv.memory[parent_memory(is_s)],
+                root[is_s.idx()],
+                true,
+                false,
+                root[is_s.idx()],
+            )?;
+            KeyData::witness_store_cached(
+                region,
+                offset,
+                &mut pv.memory[key_memory(is_s)],
+                F::zero(),
+                F::one(),
+                0,
+                false,
+                F::zero(),
+                F::one(),
+            )?;
+        }
+
+        Ok(())
+    }
+
 }
diff --git a/zkevm-circuits/src/mpt_circuit/storage_leaf.rs b/zkevm-circuits/src/mpt_circuit/storage_leaf.rs
index a47f0dedf2..d603a89fa5 100644
--- a/zkevm-circuits/src/mpt_circuit/storage_leaf.rs
+++ b/zkevm-circuits/src/mpt_circuit/storage_leaf.rs
@@ -6,7 +6,7 @@ use halo2_proofs::{
     poly::Rotation,
 };
 
-use crate::mpt_circuit::helpers::{num_nibbles, IsEmptyTreeGadget};
+use crate::{mpt_circuit::helpers::{num_nibbles, IsEmptyTreeGadget}, evm_circuit::util::CachedRegion};
 use crate::table::ProofType;
 use crate::{
     circuit,
@@ -443,4 +443,184 @@ impl<F: Field> StorageLeafConfig<F> {
 
         Ok(())
     }
+    
+    pub fn assign_cached(
+        &self,
+        region: &mut CachedRegion<F>,
+        ctx: &MPTConfig<F>,
+        pv: &mut MPTState<F>,
+        offset: usize,
+        node: &Node,
+    ) -> Result<(), Error> {
+        let storage = &node.storage.clone().unwrap();
+
+        let key_bytes = [
+            node.values[StorageRowType::KeyS as usize].clone(),
+            node.values[StorageRowType::KeyC as usize].clone(),
+        ];
+        let value_bytes = [
+            node.values[StorageRowType::ValueS as usize].clone(),
+            node.values[StorageRowType::ValueC as usize].clone(),
+        ];
+        let drifted_bytes = node.values[StorageRowType::Drifted as usize].clone();
+        let wrong_bytes = node.values[StorageRowType::Wrong as usize].clone();
+
+        let main_data =
+            self.main_data
+                .witness_load_cached(region, offset, &pv.memory[main_memory()], 0)?;
+
+        let mut key_data = vec![KeyDataWitness::default(); 2];
+        let mut parent_data = vec![ParentDataWitness::default(); 2];
+        let mut key_rlc = vec![0.scalar(); 2];
+        let mut value_rlc = vec![0.scalar(); 2];
+        for is_s in [true, false] {
+            parent_data[is_s.idx()] = self.parent_data[is_s.idx()].witness_load_cached(
+                region,
+                offset,
+                &mut pv.memory[parent_memory(is_s)],
+                0,
+            )?;
+
+            let rlp_key_witness = self.rlp_key[is_s.idx()].assign_cached(
+                region,
+                offset,
+                &storage.list_rlp_bytes[is_s.idx()],
+                &key_bytes[is_s.idx()],
+            )?;
+
+            let (_, leaf_mult) = rlp_key_witness.rlc_leaf(ctx.r);
+            self.key_mult[is_s.idx()].assign_cached(region, offset, leaf_mult)?;
+
+            self.is_not_hashed[is_s.idx()].assign_cached(
+                region,
+                offset,
+                rlp_key_witness.rlp_list.num_bytes().scalar(),
+                32.scalar(),
+            )?;
+
+            key_data[is_s.idx()] = self.key_data[is_s.idx()].witness_load_cached(
+                region,
+                offset,
+                &mut pv.memory[key_memory(is_s)],
+                0,
+            )?;
+            KeyData::witness_store_cached(
+                region,
+                offset,
+                &mut pv.memory[key_memory(is_s)],
+                F::zero(),
+                F::one(),
+                0,
+                false,
+                F::zero(),
+                F::one(),
+            )?;
+
+            // Key
+            (key_rlc[is_s.idx()], _) = rlp_key_witness.key.key(
+                rlp_key_witness.key_value.clone(),
+                key_data[is_s.idx()].rlc,
+                key_data[is_s.idx()].mult,
+                ctx.r,
+            );
+
+            // Value
+            for (cell, byte) in self.value_rlp_bytes[is_s.idx()]
+                .iter()
+                .zip(storage.value_rlp_bytes[is_s.idx()].iter())
+            {
+                cell.assign_cached(region, offset, byte.scalar())?;
+            }
+            let value_witness = self.rlp_value[is_s.idx()].assign_cached(
+                region,
+                offset,
+                &storage.value_rlp_bytes[is_s.idx()],
+            )?;
+            let value_long_witness =
+                self.rlp_value_long[is_s.idx()].assign_cached(region, offset, &value_bytes[is_s.idx()])?;
+            value_rlc[is_s.idx()] = if value_witness.is_short() {
+                value_witness.rlc_value(ctx.r)
+            } else {
+                value_long_witness.rlc_value(ctx.r)
+            };
+
+            ParentData::witness_store_cached(
+                region,
+                offset,
+                &mut pv.memory[parent_memory(is_s)],
+                F::zero(),
+                true,
+                false,
+                F::zero(),
+            )?;
+
+            self.is_in_empty_trie[is_s.idx()].assign_cached(
+                region,
+                offset,
+                parent_data[is_s.idx()].rlc,
+                ctx.r,
+            )?;
+        }
+
+        let is_storage_mod_proof = self.is_storage_mod_proof.assign_cached(
+            region,
+            offset,
+            main_data.proof_type.scalar(),
+            ProofType::StorageChanged.scalar(),
+        )? == true.scalar();
+        let is_non_existing_proof = self.is_non_existing_storage_proof.assign_cached(
+            region,
+            offset,
+            main_data.proof_type.scalar(),
+            ProofType::StorageDoesNotExist.scalar(),
+        )? == true.scalar();
+
+        // Drifted leaf handling
+        self.drifted.assign_cached(
+            region,
+            offset,
+            &parent_data,
+            &storage.drifted_rlp_bytes,
+            &drifted_bytes,
+            ctx.r,
+        )?;
+
+        // Wrong leaf handling
+        let key_rlc = self.wrong.assign_cached(
+            region,
+            offset,
+            is_non_existing_proof,
+            &key_rlc,
+            &storage.wrong_rlp_bytes,
+            &wrong_bytes,
+            false,
+            key_data[true.idx()].clone(),
+            ctx.r,
+        )?;
+
+        // Put the data in the lookup table
+        let proof_type = if is_storage_mod_proof {
+            ProofType::StorageChanged
+        } else if is_non_existing_proof {
+            ProofType::StorageDoesNotExist
+        } else {
+            ProofType::Disabled
+        };
+        ctx.mpt_table.assign_cached(
+            region,
+            offset,
+            &MptUpdateRow {
+                address_rlc: main_data.address_rlc,
+                proof_type: proof_type.scalar(),
+                key_rlc: key_rlc,
+                value_prev: value_rlc[true.idx()],
+                value: value_rlc[false.idx()],
+                root_prev: main_data.root_prev,
+                root: main_data.root,
+            },
+        )?;
+
+        Ok(())
+    }
+
 }
diff --git a/zkevm-circuits/src/mpt_circuit/table.rs b/zkevm-circuits/src/mpt_circuit/table.rs
new file mode 100644
index 0000000000..5641c998ea
--- /dev/null
+++ b/zkevm-circuits/src/mpt_circuit/table.rs
@@ -0,0 +1,107 @@
+use eth_types::Field;
+use gadgets::util::Expr;
+use halo2_proofs::plonk::Expression;
+use strum_macros::EnumIter;
+use gadgets::{impl_expr, util::Scalar};
+use crate::circuit_tools::cell_manager::Table;
+
+#[derive(Clone, Copy, Debug)]
+pub enum FixedTableTag {
+    /// All zero lookup data
+    Disabled,
+    /// Power of randomness: [1, r], [2, r^2],...
+    RMult,
+    /// 0 - 15
+    Range16,
+    /// 0 - 255
+    Range256,
+    /// For checking there are 0s after the RLP stream ends
+    RangeKeyLen256,
+    /// For checking there are 0s after the RLP stream ends
+    RangeKeyLen16,
+    /// For checking RLP
+    RLP,
+    /// For distinguishing odd key part in extension
+    ExtOddKey,
+    /// State transition steps constriants
+    /// 2
+    StartNode,
+    /// 21
+    BranchNode,
+    /// 12
+    AccountNode,
+    /// 6
+    StorageNode
+}
+impl_expr!(FixedTableTag);
+
+
+#[derive(Clone, Debug)]
+pub(crate) enum Lookup<F> {
+    /// Lookup to fixed table, which contains serveral pre-built tables such as
+    /// range tables or bitwise tables.
+    Fixed {
+        /// Tag to specify which table to lookup.
+        tag: Expression<F>,
+        /// Values that must satisfy the pre-built relationship.
+        values: [Expression<F>; 5],
+    },
+
+    /// Lookup to keccak table.
+    KeccakTable {
+        /// Accumulator to the input.
+        input_rlc: Expression<F>,
+        /// Length of input that is being hashed.
+        input_len: Expression<F>,
+        /// Output (hash) until this state. This is the RLC representation of
+        /// the final output keccak256 hash of the input.
+        output_rlc: Expression<F>,
+    },
+
+    /// Conditional lookup enabled by the first element.
+    Conditional(Expression<F>, Box<Lookup<F>>),
+}
+
+impl<F: Field> Lookup<F> {
+    pub(crate) fn conditional(self, condition: Expression<F>) -> Self {
+        Self::Conditional(condition, self.into())
+    }
+
+    pub(crate) fn table(&self) -> Table {
+        match self {
+            Self::Fixed { .. } => Table::Fixed,
+            Self::KeccakTable {.. } => Table::Keccak,
+            Self::Conditional(_, lookup) => lookup.table(),
+        }
+    }
+
+    pub(crate) fn input_exprs(&self) -> Vec<Expression<F>> {
+        match self {
+            Self::Fixed { tag, values } => [vec![tag.clone()], values.to_vec()].concat(),
+            Self::KeccakTable {
+                input_rlc,
+                input_len,
+                output_rlc,
+            } => vec![
+                1.expr(), // is_enabled
+                input_rlc.clone(),
+                input_len.clone(),
+                output_rlc.clone(),
+            ],
+            Self::Conditional(condition, lookup) => lookup
+                .input_exprs()
+                .into_iter()
+                .map(|expr| condition.clone() * expr)
+                .collect(),
+        }
+    }
+
+    pub(crate) fn degree(&self) -> usize {
+        self.input_exprs()
+            .iter()
+            .map(|expr| expr.degree())
+            .max()
+            .unwrap()
+    }
+
+}
\ No newline at end of file
diff --git a/zkevm-circuits/src/table.rs b/zkevm-circuits/src/table.rs
index 04f0d43e0f..0fa31e9fdf 100644
--- a/zkevm-circuits/src/table.rs
+++ b/zkevm-circuits/src/table.rs
@@ -2,7 +2,7 @@
 
 use crate::circuit_tools::constraint_builder::ConstraintBuilder;
 use crate::copy_circuit::number_or_hash_to_field;
-use crate::evm_circuit::util::{rlc, RandomLinearCombination};
+use crate::evm_circuit::util::{rlc, RandomLinearCombination, CachedRegion};
 use crate::util::build_tx_log_address;
 use crate::util::Challenges;
 use crate::witness::{
@@ -548,6 +548,24 @@ impl MptTable {
         Ok(())
     }
 
+    pub(crate) fn assign_cached<F: Field>(
+        &self,
+        region: &mut CachedRegion<F>,
+        offset: usize,
+        row: &MptUpdateRow<F>,
+    ) -> Result<(), Error> {
+        for (column, value) in self.columns().iter().zip_eq(row.values()) {
+            region.assign_advice(
+                || "assign mpt table row value",
+                *column,
+                offset,
+                || Value::known(value),
+            )?;
+        }
+        Ok(())
+    }
+
+
     pub(crate) fn load<F: Field>(
         &self,
         layouter: &mut impl Layouter<F>,