diff --git a/README-cn.md b/README-cn.md
index 6ead303..06c110d 100644
--- a/README-cn.md
+++ b/README-cn.md
@@ -42,8 +42,8 @@
     - [二叉查找树：BSTs](#二叉查找树-bstss)
     - [堆 / 优先级队列 / 二叉堆](#堆--优先级队列--二叉堆)
     - [字典树（Tries）](#字典树tries)
-    - [平衡查找树](#balanced-search-trees)
-    - [N 叉树（K 叉树、M 叉树）](#n-ary-k-ary-m-ary-trees)
+    - [平衡查找树](#平衡查找树)
+    - [N 叉树（K 叉树、M 叉树）](#n-叉树k-叉树m-叉树)
 - [Sorting](#sorting)
 - [Graphs](#graphs)
 - [Even More Knowledge](#even-more-knowledge)