diff --git a/project/auth.py b/project/auth.py
index c0a1acc..63d4fff 100644
--- a/project/auth.py
+++ b/project/auth.py
@@ -117,7 +117,10 @@ def signup_post():
 
     activation_code = gen_activation_code(new_user.email)
     from . import smtp
-    smtp.sendmail(new_user.email, "web-gpt激活码", "欢迎注册。您的激活码是："+activation_code)
+    content = f"Hi {new_user.name}，欢迎注册！\n"
+    content += f"您的激活码是：\n{activation_code}\n\n"
+    content += "此激活码十分钟内有效，过期请联系管理员激活，谢谢！"
+    smtp.sendmail(new_user.email, "web-gpt激活码", content)
 
     return redirect(url_for('auth.login'))