Update README.md

Author: yangsishu

README.md

@@ -12,7 +12,7 @@
   * 维表：mysql, SQlServer,oracle, hbase, mongo, redis, cassandra, serversocket, kudu, postgresql, clickhouse, impala, db2, sqlserver
   * 结果表：mysql, SQlServer, oracle, hbase, elasticsearch5.x, mongo, redis, cassandra, console, kudu, postgresql, clickhouse, impala, db2, sqlserver
 
-# 钉钉交流群
+# 钉钉交流群（可以搜索群号30537511，也可以扫下面的二维码）
 
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     <img src=https://user-images.githubusercontent.com/11881814/76816457-3df44800-683b-11ea-94cc-707fb0250a9a.png width=600 />