diff --git a/labs/doris/readme.md b/labs/doris/readme.md
index 1d46ad16..3d0304ad 100644
--- a/labs/doris/readme.md
+++ b/labs/doris/readme.md
@@ -112,4 +112,8 @@ PROPERTIES (
 ## superset 使用
 
 1. 参考地址：https://hub.docker.com/r/apache/superset
-2. 连接字符串：mysql://root:aA123456!@192.168.100.144:3306/example?charset=utf8
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+2. 连接字符串：mysql://root:aA123456!@192.168.100.144:3306/example?charset=utf8
+
+## 开源 im
+
+tinode\Rocket.Chat
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