diff --git a/README.md b/README.md
index e8b30cf..d2c3250 100644
--- a/README.md
+++ b/README.md
@@ -8,27 +8,20 @@
 ![](install.png)
 ![](routeros.png)
 
-### Uses keygen to generate license key.
+### Uses keygen to license RouterOS.
 ![](keygen.png)
 
-## How generate license key (***keygen.exe run on windows***)
-    keygen.zip in iso or img root directory,for chr image it's in /flash/rw/disk/ directory,same as winbox file manager directory
-    run unzip keygen.zip
-    run keygen.exe
-    input your software id
 ## How to use shell
     install option-{version}.npk package
     run telnet to routeros with username devel and password is same as admin
+## How to license RouterOS
+    telnet to routeros with username devel and password is same as admin
+    run keygen
+    it's over,just run keygen everything is ok.
 ## How to use python3
     install python3-{version}.npk package
     run telnet to routeros with username devel and password is same as admin
     run python -V
-## How Covert x86 and Chr (Chr mode could auto resize disk)
-    to Chr,run this command in shell
-    echo -e "\x01" | dd of=/dev/sda bs=1 count=1 seek=336 conv=notrunc
-    to x86,run this command in shell
-    echo -e "\x00" | dd of=/dev/sda bs=1 count=1 seek=336 conv=notrunc
-    if you want to resize disk,convert to chr first,then resize disk and convert to x86
 ### npk.py
     Sign，Verify，Create, Extract npk file.
 ### patch.py
diff --git a/README_CN.md b/README_CN.md
index 48f8eac..734596c 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -9,26 +9,20 @@
 ![](install.png)
 ![](routeros.png)
 
-### 使用ISO或IMG内的Keygen生成授权许可
+### 使用keygen授权RouterOS
 ![](keygen.png)
 
-## 如何生成授权许可 (Keygen.exe在windows命令行下运行)
-    keygen.zip在iso或者img文件的根目录下；chr镜像文件/rw/disk/目录下，和winbox打开后files目录一致。
-    解压缩 keygen.zip
-    运行 keygen.exe 输入software_id
 ## 如何使用Shell
     安装 option-{version}.npk 包
     telnet到RouterOS,用户名devel,密码与admin的密码相同
+## 如何授权许可
+    进入shell
+    运行 keygen 即可。
+    参考上图。
 ## 如何使用Python
     安装 python3-{version}.npk 包
     telnet到RouterOS,用户名devel,密码与admin的密码相同
     运行 python -V
-## x86和Chr如何转换(Chr模式自动扩容硬盘)
-    转换到Chr,在shell中运行下面命令
-    echo -e "\x01" | dd of=/dev/sda bs=1 count=1 seek=336 conv=notrunc
-    转换到x86,在shell中运行下面命令
-    echo -e "\x00" | dd of=/dev/sda bs=1 count=1 seek=336 conv=notrunc
-    如果硬盘扩容了，需要切换到Chr启动后，硬盘才会自动扩容，然后再切换为x86模式重新启动。
 ### npk.py
     对npk文件进行解包，修改，创建，签名和验证
 ### patch.py
diff --git a/keygen.png b/keygen.png
index 6fd9fbd..a5f220a 100644
Binary files a/keygen.png and b/keygen.png differ