diff --git a/_toc.yml b/_toc.yml
index c78b390..31b1b6f 100644
--- a/_toc.yml
+++ b/_toc.yml
@@ -1,5 +1,15 @@
 format: jb-book
 root: index.md
-chapters:
-  - file: general.md
-  - file: web_server/README.md
+parts:
+  - caption: 原则
+    chapters:
+      - file: principles/README.md
+  - caption: 客户端
+    chapters:
+      - file: sdk/README.md
+        sections: 
+          - file: sdk/api_client.md
+      - file: cli/README.md
+  - caption: 服务端
+    chapters:
+      - file: server/README.md
\ No newline at end of file
diff --git a/cli/README.md b/cli/README.md
new file mode 100644
index 0000000..a9fc94c
--- /dev/null
+++ b/cli/README.md
@@ -0,0 +1,4 @@
+# 命令行工具
+
+使用[`typer`](https://typer.tiangolo.com)作为主要的命令行开发框架。
+标准库`argparse`（`optparse`已废弃）、第三方库`click`等作为备选框架。
diff --git a/general.md b/principles/README.md
similarity index 99%
rename from general.md
rename to principles/README.md
index 524965e..55a22b7 100644
--- a/general.md
+++ b/principles/README.md
@@ -1,4 +1,4 @@
-# 基本规则
+# 原则
 
 ## 项目结构
 
diff --git a/sdk/README.md b/sdk/README.md
index 8aae8df..3a33b28 100644
--- a/sdk/README.md
+++ b/sdk/README.md
@@ -1,4 +1,4 @@
-# 云SDK类Python依赖
+# SDK
 
 ## 预期特性
 
diff --git a/server/README.md b/server/README.md
new file mode 100644
index 0000000..3ff7d01
--- /dev/null
+++ b/server/README.md
@@ -0,0 +1,3 @@
+# 服务端
+
+使用FastAPI作为首选框架。Django和Flask作为备选框架。
diff --git a/web_server/README.md b/web_server/README.md
deleted file mode 100644
index 1994e92..0000000
--- a/web_server/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# Web服务器
-
-使用FastAPI作为首选框架、Django和Flask作为备选框架。