diff --git a/src/Infrastructure/BotSharp.OpenAPI/Controllers/UserController.cs b/src/Infrastructure/BotSharp.OpenAPI/Controllers/UserController.cs
index 253c19be..cb254f50 100644
--- a/src/Infrastructure/BotSharp.OpenAPI/Controllers/UserController.cs
+++ b/src/Infrastructure/BotSharp.OpenAPI/Controllers/UserController.cs
@@ -153,7 +153,7 @@ public class UserController : ControllerBase
     }
 
     [HttpPost("/user/phone/modify")]
-    public async Task<bool> ModifyUserPhone([FromQuery] string phone, [FromQuery] string regionCode)
+    public async Task<bool> ModifyUserPhone([FromQuery] string phone, [FromQuery] string regionCode = "CN")
     {
         return await _userService.ModifyUserPhone(phone, regionCode);
     }
diff --git a/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Users/UserResetPasswordModel.cs b/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Users/UserResetPasswordModel.cs
index df0601c5..0632a8f8 100644
--- a/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Users/UserResetPasswordModel.cs
+++ b/src/Infrastructure/BotSharp.OpenAPI/ViewModels/Users/UserResetPasswordModel.cs
@@ -6,7 +6,7 @@ public class UserResetPasswordModel
     public string? Phone { get; set; }
     public string Password { get; set; } = string.Empty;
     public string VerificationCode { get; set; }
-    public string? RegionCode { get; set; }
+    public string RegionCode { get; set; } = "CN";
 
     public User ToUser()
     {