diff --git a/04_ArithmeticOp/ArithmeticOp.ipynb b/04_ArithmeticOp/ArithmeticOp.ipynb
index 5be3fbb..347e02a 100644
--- a/04_ArithmeticOp/ArithmeticOp.ipynb
+++ b/04_ArithmeticOp/ArithmeticOp.ipynb
@@ -151,7 +151,6 @@
     "                self.push(size)\n",
     "            elif op == PUSH0: # 如果为PUSH0\n",
     "                self.stack.append(0)\n",
-    "                self.pc += size\n",
     "            elif op == POP: # 如果为POP\n",
     "                self.pop()\n",
     "            elif op == ADD: # 处理ADD指令\n",