diff --git a/src/SUMMARY.md b/src/SUMMARY.md
index ddb9729d..3bf607de 100644
--- a/src/SUMMARY.md
+++ b/src/SUMMARY.md
@@ -315,13 +315,13 @@
 ---
 
 - [Appendix]()
-  - [A-关键字](appendix/keywords.md)
-  - [B-运算符与符号](appendix/operators.md)
-  - [C-表达式](appendix/expressions.md)
-  - [D-派生特征 trait](appendix/derive.md)
-  - [E-prelude 模块 todo](appendix/prelude.md)
-  - [F-Rust 版本说明](appendix/rust-version.md)
-  - [G-Rust 更新版本列表](appendix/rust-versions/intro.md)
+  - [关键字](appendix/keywords.md)
+  - [运算符与符号](appendix/operators.md)
+  - [表达式](appendix/expressions.md)
+  - [派生特征 trait](appendix/derive.md)
+  - [prelude 模块 todo](appendix/prelude.md)
+  - [Rust 版本说明](appendix/rust-version.md)
+  - [Rust 历次版本更新解读](appendix/rust-versions/intro.md)
     - [1.58](appendix/rust-versions/1.58.md)
     - [1.59](appendix/rust-versions/1.59.md)
     - [1.60](appendix/rust-versions/1.60.md)
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