diff --git a/NLP_recommend/Using side features: feature preprocessing.md b/NLP_recommend/Using side features: feature preprocessing.md
index cef3420121b6498f23f4c08f21953d24e8359913..77556983b7f5a248bff0a1c26490e77ba0c938c7 100644
--- a/NLP_recommend/Using side features: feature preprocessing.md	
+++ b/NLP_recommend/Using side features: feature preprocessing.md	
@@ -301,4 +301,4 @@ for row in ratings.batch(1).take(1):
   print(f"Computed representations: {movie_model(row)[0, :3]}")
 ```
 
-代码地址: 
\ No newline at end of file
+代码地址: https://codechina.csdn.net/csdn_codechina/enterprise_technology/-/blob/master/NLP_recommend/Using%20side%20features:%20feature%20preprocessing.ipynb
\ No newline at end of file