diff --git a/docs/notes/01_c-basic/07_xdx/index.md b/docs/notes/01_c-basic/07_xdx/index.md
index a4e7432..f18bdc0 100644
--- a/docs/notes/01_c-basic/07_xdx/index.md
+++ b/docs/notes/01_c-basic/07_xdx/index.md
@@ -1,4 +1,4 @@
-# 第一章：相关概念
+# 第一章：前言
 
 ## 1.1 运算符、表达式和操作数