diff --git a/frontend/messages/zh-CN.json b/frontend/messages/zh-CN.json
index a4bf551c..38d86215 100644
--- a/frontend/messages/zh-CN.json
+++ b/frontend/messages/zh-CN.json
@@ -28,7 +28,7 @@
 	"alternative_sign_in_methods": "其他登录方式",
 	"login_background": "登录页背景图",
 	"logo": "图标",
-	"login_code": "登录码",
+	"login_code": "登录代码",
 	"create_a_login_code_to_sign_in_without_a_passkey_once": "创建一个登录代码，用户可以使用它进行一次免密钥登录。",
 	"one_hour": "1 小时",
 	"twelve_hours": "12 小时",
@@ -202,6 +202,14 @@
 	"this_can_be_useful_for_selfsigned_certificates": "这对于自签证书很有用。",
 	"enabled_emails": "启用邮件通知",
 	"email_login_notification": "登录通知邮件",
+	"email_login_notification_description": "Choose when users receive an email after signing in.",
+	"login_notification_disabled_description": "Do not send sign-in notification emails or use browser recognition cookies.",
+	"login_notification_always": "Every sign-in",
+	"login_notification_always_description": "Send an email after every successful sign-in. No browser recognition cookie is used.",
+	"login_notification_ip_and_user_agent": "New IP address or browser",
+	"login_notification_ip_and_user_agent_description": "Send an email when the exact combination of IP address and browser User-Agent is not in the user's sign-in history. No browser recognition cookie is used.",
+	"login_notification_browser_recognition": "Unrecognized browser",
+	"login_notification_browser_recognition_description": "Send an email unless the browser is recognized by its cookie or a matching IP address and User-Agent in the user's sign-in history.",
 	"send_an_email_to_the_user_when_they_log_in_from_a_new_device": "当用户从新设备登录时，向其发送电子邮件。",
 	"emai_login_code_requested_by_user": "用户请求邮箱登录码",
 	"allow_users_to_sign_in_with_a_login_code_sent_to_their_email": "允许用户通过请求发送到其邮箱的登录码来绕过通行密钥。这会显著降低安全性，因为任何能访问用户邮箱的人都可以登录。",