diff --git a/docs/cs.md b/docs/cs.md
index b518358..b50a2f3 100644
--- a/docs/cs.md
+++ b/docs/cs.md
@@ -213,7 +213,8 @@ string multiLine = """
 Console.WriteLine(multiLine); // => Content begin "Hello World!" /\n<>"" end.
 ```
 
-###字符串操作
+### 字符串操作
+
 ```cs
 //字符串分割
 string Name = "字A符A串A分A割";
@@ -237,8 +238,6 @@ Console.WriteLine(Rep);
 //会把字符中的 “1”替换成“串”
 ```
 
-
-
 杂项
 -----------