diff --git a/README.md b/README.md
index 07671d39..45d1d783 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,19 @@
 English | [简体中文](./README_CN.md)
 <a href="https://github.com/zfoo-project/zfoo"><img src="/doc/image/logo.jpg" width="30%"></a>
 
+-----------
+Attention:
+-----------
+
+- The main branch is a development version for Java 21 and GraalVM. The stable version is [zfoo-java-11-17](https://github.com/zfoo-project/zfoo/tree/zfoo-java-11-17)
+- Upgrade process
+  - reimport not found classes
+  - no need to inherit IPacket anymore
+  - SafeRunnable has been deleted, please use ThreadUtils.safeRunnable()
+  - rename interfaces and annotations，Storage -> IStorage，@Resource -> @Storage，@ResInjection -> @StorageAutowired
+  - rename interfaces and annotations，@EntityCachesInjection -> @EntityCacheAutowired，@EntityCaches -> @EntityCache
+
+
 -----------
 Why is zfoo protocol ?
 -----------
diff --git a/README_CN.md b/README_CN.md
index 31d7606e..bb372817 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -1,6 +1,18 @@
 简体中文 | [English](./README.md)
 <a href="https://github.com/zfoo-project/zfoo"><img src="/doc/image/logo.jpg" width="30%"></a>
 
+-----------
+注意
+-----------
+
+- 主干main是当前是面向java 21和GraalVM的开发版本，稳定版本请使用 [zfoo-java-11-17](https://github.com/zfoo-project/zfoo/tree/zfoo-java-11-17)
+- 升级流程
+  - 重新导入找不到的类
+  - 不需要再继承IPacket
+  - SafeRunnable删除了，请使用ThreadUtils.safeRunnable()
+  - 重命名接口和注解，Storage -> IStorage，@Resource -> @Storage，@ResInjection -> @StorageAutowired
+  - 重命名接口和注解，@EntityCachesInjection -> @EntityCacheAutowired，@EntityCaches -> @EntityCache
+
 -----------
 Why is zfoo protocol ?
 -----------
@@ -176,40 +188,3 @@ doc[module]: 增加了什么文档
 zfoo使用 [Apache License Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)
 
 ![JetBrains Logo (Main) logo](https://resources.jetbrains.com/storage/products/company/brand/logos/jb_beam.svg)
-
-## 升级日志
-
-- protocol
-
-```
-不需要再继承IPacket
-```
-
-
-- event
-
-```
-com.zfoo.event.model.anno.EventReceiver  ->  com.zfoo.event.anno.EventReceiver
-```
-
-- orm complete refactoring
-```
-Storage -> IStorage
-@Resource -> @Storage
-@ResInjection -> @StorageAutowired
-```
-
-- storage complete refactoring
-
-- utils
-
-```
-com.zfoo.util.NetUtils ->  com.zfoo.net.util.NetUtils
-com.zfoo.util.ThreadUtils ->  com.zfoo.protocol.util.ThreadUtils
-com.zfoo.util.math.NumberUtils ->  com.zfoo.protocol.util.NumberUtils
-com.zfoo.util.math.RandomUtils ->  com.zfoo.protocol.util.RandomUtils
-com.zfoo.util.security.IdUtils ->  com.zfoo.protocol.util.UuidUtils
-com.zfoo.util.security.security.*  ->  com.zfoo.net.util.security.*
-```
-
-- SafeRunnable删除了，请使用ThreadUtils.safeRunnable
\ No newline at end of file