--- a/client/src/__locales/zh-cn.json
+++ b/client/src/__locales/zh-cn.json
@@ -571,7 +571,7 @@
     "filters_interval": "过滤器更新间隔",
     "disabled": "已禁用",
     "username_label": "用户名",
-    "username_placeholder": "输入用户名",
+    "username_placeholder": "默认用户名密码都是root",
     "password_label": "密码",
     "password_placeholder": "输入密码",
     "sign_in": "登入",