diff --git a/readme.md b/readme.md
index 507124a..442bdff 100644
--- a/readme.md
+++ b/readme.md
@@ -105,3 +105,9 @@ docker run -it --rm -p 23034:80 -p 23033:23033 blackmiaool/blacksocket.io
 ```
 
 Open the [website](http://localhost:23034)
+
+### About document
+> https://raw.githubusercontent.com/blackmiaool/blacksocket.io/master/image.png
+> ----<Refactoring JavaScript Turning Bad Code Into Good Code>
+
+