diff --git a/readme.md b/readme.md
index 573d857..9ef8012 100644
--- a/readme.md
+++ b/readme.md
@@ -86,4 +86,4 @@ If any question about the project or me ,see https://liuhuanyong.github.io/
 3、about me:刘焕勇，lhy_in_blcu@126.com.         
 4、我的技术公众号:老刘说NLP,扫码一键关注：  
 
-![image](https://github.com/liuhuanyong/QABasedOnMedicalKnowledgeGraph/blob/main/img/wechat.jpg)
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+![image](https://github.com/liuhuanyong/QABasedOnMedicalKnowledgeGraph/blob/master/img/wechat.jpg)
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