diff --git a/contents/SUMMARY.md b/contents/SUMMARY.md
index f459fec9..190d7f86 100644
--- a/contents/SUMMARY.md
+++ b/contents/SUMMARY.md
@@ -228,13 +228,29 @@
     - [HashMap todo](std/hashmap.md)
     - [Iterator常用方法 todo](std/iterator.md)
 
-- [场景化用例 todo](cases/intro.md)
-  - [文件操作 todo](cases/file.md)
-  - [网络通信 todo](cases/protocol.md)
-  - [JSON处理 todo](cases/json.md)
-  - [HTTP请求 todo](cases/http.md)
+- [Ctrl-C/V: 编程常用代码片段 todo](cases/intro.md)
+  - [命令行解析 todo](cases/cmd.md)
+  - [配置文件解析 todo](cases/config.md)
+  - [编解码 todo](cases/encoding/intro.md)
+    - [JSON](cases/encoding/json.md)
+    - [CSV](cases/encoding/csv.md)
+    - [protobuf](cases/encoding/protobuf.md)
+  - [文件系统 todo](cases/file/intro.md)
+    - [文件读写](cases/file/file.md)
+    - [目录操作](cases/file/dir.md)
+  - [网络通信 todo](cases/protocol/intro.md)
+    - [HTTP](cases/protocol/http.md)
+    - [TCP](cases/protocol/tcp.md)
+    - [UDP](cases/protocol/udp.md)
+    - [gRPC](cases/protocol/grpc.md)
   - [数据库访问 todo](cases/database.md)
   - [正则表达式 todo](cases/regexp.md)
+  - [加密解密 todo](cases/crypto.md)
+  - [时间日期](cases/date.md)
+  - [开发调试 todo](cases/dev/intro.md)
+    - [日志](cases/dev/logs.md)
+    - [性能分析](cases/dev/profile.md)
+    
 <!-- 
 - [Rust区块链入门]()
 - [Rust游戏开发入门]()
diff --git a/contents/cases/cmd.md b/contents/cases/cmd.md
new file mode 100644
index 00000000..ed9e9191
--- /dev/null
+++ b/contents/cases/cmd.md
@@ -0,0 +1 @@
+# 命令行
diff --git a/contents/cases/config.md b/contents/cases/config.md
new file mode 100644
index 00000000..33eb3d73
--- /dev/null
+++ b/contents/cases/config.md
@@ -0,0 +1 @@
+# 配置文件 todo
diff --git a/contents/cases/crypto.md b/contents/cases/crypto.md
new file mode 100644
index 00000000..f9455099
--- /dev/null
+++ b/contents/cases/crypto.md
@@ -0,0 +1 @@
+# 加密解密 todo
diff --git a/contents/cases/date.md b/contents/cases/date.md
new file mode 100644
index 00000000..a434528a
--- /dev/null
+++ b/contents/cases/date.md
@@ -0,0 +1 @@
+# 时间日期
diff --git a/contents/cases/dev/intro.md b/contents/cases/dev/intro.md
new file mode 100644
index 00000000..f0cc50f0
--- /dev/null
+++ b/contents/cases/dev/intro.md
@@ -0,0 +1 @@
+# 开发调试
diff --git a/contents/cases/dev/logs.md b/contents/cases/dev/logs.md
new file mode 100644
index 00000000..65c2dbdd
--- /dev/null
+++ b/contents/cases/dev/logs.md
@@ -0,0 +1 @@
+# 日志
diff --git a/contents/cases/dev/profile.md b/contents/cases/dev/profile.md
new file mode 100644
index 00000000..124678e8
--- /dev/null
+++ b/contents/cases/dev/profile.md
@@ -0,0 +1 @@
+# 性能分析
diff --git a/contents/cases/encoding/csv.md b/contents/cases/encoding/csv.md
new file mode 100644
index 00000000..19f2031e
--- /dev/null
+++ b/contents/cases/encoding/csv.md
@@ -0,0 +1 @@
+# CSV
diff --git a/contents/cases/encoding/intro.md b/contents/cases/encoding/intro.md
new file mode 100644
index 00000000..0e61f3d0
--- /dev/null
+++ b/contents/cases/encoding/intro.md
@@ -0,0 +1 @@
+# 编解码
diff --git a/contents/cases/encoding/json.md b/contents/cases/encoding/json.md
new file mode 100644
index 00000000..02ed5a24
--- /dev/null
+++ b/contents/cases/encoding/json.md
@@ -0,0 +1 @@
+# JSON
diff --git a/contents/cases/encoding/protobuf.md b/contents/cases/encoding/protobuf.md
new file mode 100644
index 00000000..4fdb7ce0
--- /dev/null
+++ b/contents/cases/encoding/protobuf.md
@@ -0,0 +1 @@
+# protobuf
diff --git a/contents/cases/file.md b/contents/cases/file.md
deleted file mode 100644
index e3b630ee..00000000
--- a/contents/cases/file.md
+++ /dev/null
@@ -1 +0,0 @@
-# 文件操作
diff --git a/contents/cases/file/dir.md b/contents/cases/file/dir.md
new file mode 100644
index 00000000..c996c7a0
--- /dev/null
+++ b/contents/cases/file/dir.md
@@ -0,0 +1 @@
+# 目录操作
diff --git a/contents/cases/file/file.md b/contents/cases/file/file.md
new file mode 100644
index 00000000..9286f56a
--- /dev/null
+++ b/contents/cases/file/file.md
@@ -0,0 +1 @@
+# 文件读写
diff --git a/contents/cases/file/intro.md b/contents/cases/file/intro.md
new file mode 100644
index 00000000..0f8e6d56
--- /dev/null
+++ b/contents/cases/file/intro.md
@@ -0,0 +1 @@
+# 文件系统 todo
diff --git a/contents/cases/http.md b/contents/cases/http.md
deleted file mode 100644
index e184500b..00000000
--- a/contents/cases/http.md
+++ /dev/null
@@ -1 +0,0 @@
-# HTTP请求 todo
diff --git a/contents/cases/json.md b/contents/cases/json.md
deleted file mode 100644
index c5425e5b..00000000
--- a/contents/cases/json.md
+++ /dev/null
@@ -1 +0,0 @@
-# JSON处理 todo
diff --git a/contents/cases/protocol/grpc.md b/contents/cases/protocol/grpc.md
new file mode 100644
index 00000000..37b724e9
--- /dev/null
+++ b/contents/cases/protocol/grpc.md
@@ -0,0 +1 @@
+# gRPC
diff --git a/contents/cases/protocol/http.md b/contents/cases/protocol/http.md
new file mode 100644
index 00000000..03fe6a2d
--- /dev/null
+++ b/contents/cases/protocol/http.md
@@ -0,0 +1 @@
+# HTTP
diff --git a/contents/cases/protocol.md b/contents/cases/protocol/intro.md
similarity index 100%
rename from contents/cases/protocol.md
rename to contents/cases/protocol/intro.md
diff --git a/contents/cases/protocol/tcp.md b/contents/cases/protocol/tcp.md
new file mode 100644
index 00000000..fd208cbf
--- /dev/null
+++ b/contents/cases/protocol/tcp.md
@@ -0,0 +1 @@
+# TCP
diff --git a/contents/cases/protocol/udp.md b/contents/cases/protocol/udp.md
new file mode 100644
index 00000000..2827b96c
--- /dev/null
+++ b/contents/cases/protocol/udp.md
@@ -0,0 +1 @@
+# UDP