diff --git a/ids/readme.md b/ids/readme.md
index 9f7d25b..69c6314 100644
--- a/ids/readme.md
+++ b/ids/readme.md
@@ -1,9 +1,10 @@
 
-# id package
+# id package,推荐使用雪花算法,以获取分布式的id并且是稠密索引id
 
 * snowflake clone from github   https://github.com/bwmarrin/snowflake
 
 
+
 ### how to use it
 
 ```go