diff --git a/README.md b/README.md
index 057ed9f..1db7c6d 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 
 一个开箱即用的中后台前端/设计解决方案（主要依赖组件库 [ant-design-vue](https://github.com/vueComponent/ant-design-vue) ）
 [预览地址](https://iczer.gitee.io/vue-antd-admin)  
-![image](https://gitee.com/iczer/vue-antd-admin/raw/master/src/assets/img/preview.jpg)
+![image](https://gitee.com/iczer/vue-antd-admin/raw/master/src/assets/img/preview.png)
 ## 重要
 该项目目前已升级至 vue-cli3 开发环境，部分依赖组件库版本也已更新至最新版本。  
 vue-cli2 环境代码已封版 [v0.0.1](https://github.com/iczer/vue-antd-admin/tree/0.0.1)，如有需要，[点我查看](https://github.com/iczer/vue-antd-admin/tree/0.0.1)  
diff --git a/src/assets/img/preview.jpg b/src/assets/img/preview.jpg
deleted file mode 100644
index 6ffab0f..0000000
Binary files a/src/assets/img/preview.jpg and /dev/null differ
diff --git a/src/assets/img/preview.png b/src/assets/img/preview.png
new file mode 100644
index 0000000..e204aed
Binary files /dev/null and b/src/assets/img/preview.png differ
diff --git a/src/mock/user/login.js b/src/mock/user/login.js
index 6f01b6e..c22663c 100644
--- a/src/mock/user/login.js
+++ b/src/mock/user/login.js
@@ -19,7 +19,7 @@ Mock.mock('/login', 'post', ({body}) => {
     result.message = '账户名或密码错误（admin/888888）'
   } else {
     result.code = 0
-    result.message = Mock.mock('@TIMEFIX') + '，欢迎回来'
+    result.message = Mock.mock('@TIMEFIX').CN + '，欢迎回来'
     result.data = {}
     result.data.user = user
   }