diff --git a/docs/index.md b/docs/index.md
index 03c2f380..89f00a57 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -131,7 +131,7 @@
 
  
 
-[![unit_weight.png](http://m5-docs.oss-cn-shenzhen.aliyuncs.com/assets/img/product_pics/homepage_picture/unit/unit_weight_01.png)](en/unit/weight)
+[![unit_weight.png](http://m5-docs.oss-cn-shenzhen.aliyuncs.com/assets/img/product_pics/homepage_picture/unit/unit_weight_01.png)](en/unit/weight)         [![unit_trace.png](http://m5-docs.oss-cn-shenzhen.aliyuncs.com/assets/img/product_pics/homepage_picture/unit/unit_trace_01.png)](en/unit/trace)
 
  
 
diff --git a/docs/zh_CN/README.md b/docs/zh_CN/README.md
index eeff9057..262f3771 100644
--- a/docs/zh_CN/README.md
+++ b/docs/zh_CN/README.md
@@ -118,7 +118,7 @@
 
  
 
-[![unit_weight.png](http://m5-docs.oss-cn-shenzhen.aliyuncs.com/assets/img/product_pics/homepage_picture/unit/unit_weight_01.png)](zh_CN/unit/weight)
+[![unit_weight.png](http://m5-docs.oss-cn-shenzhen.aliyuncs.com/assets/img/product_pics/homepage_picture/unit/unit_weight_01.png)](zh_CN/unit/weight)         [![unit_trace.png](http://m5-docs.oss-cn-shenzhen.aliyuncs.com/assets/img/product_pics/homepage_picture/unit/unit_trace_01.png)](zh_CN/unit/trace)