diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -51,4 +51,4 @@
 
 ## 决策树 | 第25天
 
-决策树实现
+[决策树实现](https://github.com/MachineLearning100/100-Days-Of-ML-Code/blob/master/Code/Day%2025%20Decision%20Tree.md)