Update README.md

Author: adeept

README.md

@@ -8,33 +8,33 @@
 [Documentation for structure assembly]: https://www.adeept.com/learn/
 Getting Started with Raspberry Pi Robot and Python 
 ----
-1. [Getting Started with Raspberry Pi Robot and Python](#getting-started-with-raspberry-pi-robot-and-python)
-2. [1. Premise](#1-premise)
-   1. [1.1 STEAM and Raspberry Pi](#11-steam-and-raspberry-pi)
-   2. [1.2 About the Documentation](#12-about-the-documentation)
-3. [2. Getting to Use the Raspberry Pi](#2-getting-to-use-the-raspberry-pi)
-   1. [2.1 Write the Raspberry Pi image to an SD card](#21-write-the-raspberry-pi-image-to-an-sd-card)
-      1. [2.1.1 Method A: Write 'Raspbian' to the SD card by `Raspberry Pi Imager`](#211-method-a-write-raspbian-to-the-sd-card-by-raspberry-pi-imager)
-      2. [2.1.2 Method B: Download the image file `Raspbian` and write it to the SD card manually](#212-method-b-download-the-image-file-raspbian-and-write-it-to-the-sd-card-manually)
-      3. [2.1.3 Method C: Manually download the image file provided by us and write it to the SD card (not recommended)](#213-method-c-manually-download-the-image-file-provided-by-us-and-write-it-to-the-sd-card-not-recommended)
-   2. [2.2 Enable SSH Server of Raspberry Pi](#22-enable-ssh-server-of-raspberry-pi)
-      1. [2.2.1 Method A: Enable SSH with peripherals](#221-method-a-enable-ssh-with-peripherals)
-      2. [2.2.2 Method A: Enable SSH without peripherals](#222-method-a-enable-ssh-without-peripherals)
-   3. [2.3 Configure WiFi on Raspberry Pi](#23-configure-wifi-on-raspberry-pi)
-      1. [2.3.1 Method A: WiFi connection with peripherals](#231-method-a-wifi-connection-with-peripherals)
-      2. [2.3.2 Method A: WiFi connection without peripherals](#232-method-a-wifi-connection-without-peripherals)
-4. [3 Software Installation & Operation on Raspberry Pi](#3-software-installation--operation-on-raspberry-pi)
-   1. [3.1 Log into Raspberry Pi (Windows 10)](#31-log-into-raspberry-pi-windows-10)
-   2. [3.2 Log into Raspberry Pi (Linux or Mac OS)](#32-log-into-raspberry-pi-linux-or-mac-os)
-   3. [3.3 Log into Raspberry Pi (Windows)](#33-log-into-raspberry-pi-windows)
-   4. [3.4 Download Program of the Raspberry Pi Robot](#34-download-program-of-the-raspberry-pi-robot)
-   5. [3.5 Install Corresponding Dependent Libraries](#35-install-corresponding-dependent-libraries)
-   6. [3.6 Run the Raspberry Pi Robot's Program](#36-run-the-raspberry-pi-robots-program)
-5. [4 Precautions for Structure Assembly](#4-precautions-for-structure-assembly)
-      1. [4.1 Documentation for structure assembly](#41-documentation-for-structure-assembly)
-      2. [4.2 Precautions for Structure Assembly](#42-precautions-for-structure-assembly)
-6. [5 Controlling Robot via WEB App](#5-controlling-robot-via-web-app)
-7. [6 Q&A](#6-qa)
+* [Getting Started with Raspberry Pi Robot and Python](#getting-started-with-raspberry-pi-robot-and-python)
+    * [1. Premise](#1-premise)
+       * [1.1 STEAM and Raspberry Pi](#11-steam-and-raspberry-pi)
+       * [1.2 About the Documentation](#12-about-the-documentation)
+    * [2. Getting to Use the Raspberry Pi](#2-getting-to-use-the-raspberry-pi)
+       * [2.1 Write the Raspberry Pi image to an SD card](#21-write-the-raspberry-pi-image-to-an-sd-card)
+          * [2.1.1 Method A: Write 'Raspbian' to the SD card by Raspberry Pi Imager](#211-method-a-write-raspbian-to-the-sd-card-by-raspberry-pi-imager)
+          * [2.1.2 Method B: Download the image file Raspbian and write it to the SD card manually](#212-method-b-download-the-image-file-raspbian-and-write-it-to-the-sd-card-manually)
+          * [2.1.3 Method C: Manually download the image file provided by us and write it to the SD card (not recommended)](#213-method-c-manually-download-the-image-file-provided-by-us-and-write-it-to-the-sd-card-not-recommended)
+       * [2.2 Enable SSH Server of Raspberry Pi](#22-enable-ssh-server-of-raspberry-pi)
+          * [2.2.1 Method A: Enable SSH with peripherals](#221-method-a-enable-ssh-with-peripherals)
+          * [2.2.2 Method A: Enable SSH without peripherals](#222-method-a-enable-ssh-without-peripherals)
+       * [2.3 Configure WiFi on Raspberry Pi](#23-configure-wifi-on-raspberry-pi)
+          * [2.3.1 Method A: WiFi connection with peripherals](#231-method-a-wifi-connection-with-peripherals)
+          * [2.3.2 Method A: WiFi connection without peripherals](#232-method-a-wifi-connection-without-peripherals)
+    * [3 Software Installation & Operation on Raspberry Pi](#3-software-installation--operation-on-raspberry-pi)
+       * [3.1 Log into Raspberry Pi (Windows 10)](#31-log-into-raspberry-pi-windows-10)
+       * [3.2 Log into Raspberry Pi (Linux or Mac OS)](#32-log-into-raspberry-pi-linux-or-mac-os)
+       * [3.3 Log into Raspberry Pi (Windows)](#33-log-into-raspberry-pi-windows)
+       * [3.4 Download Program of the Raspberry Pi Robot](#34-download-program-of-the-raspberry-pi-robot)
+       * [3.5 Install Corresponding Dependent Libraries](#35-install-corresponding-dependent-libraries)
+       * [3.6 Run the Raspberry Pi Robot's Program](#36-run-the-raspberry-pi-robots-program)
+    * [4 Precautions for Structure Assembly](#4-precautions-for-structure-assembly)
+          * [4.1 Documentation for structure assembly](#41-documentation-for-structure-assembly)
+          * [4.2 Precautions for Structure Assembly](#42-precautions-for-structure-assembly)
+    * [5 Controlling Robot via WEB App](#5-controlling-robot-via-web-app)
+    * [6 Q&A](#6-qa)
 
 
 ## 1. Premise