diff --git a/README.md b/README.md
index 167df83..786cade 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,8 @@
     -   KMP
 -   `树`
     - 二叉树的顺序结构
+    - 二叉树的链式存储
+    - 线索二叉树
 
 
 -   To be continued...