diff --git a/src/Infrastructure/BotSharp.Abstraction/Users/Models/UserActivationModel.cs b/src/Infrastructure/BotSharp.Abstraction/Users/Models/UserActivationModel.cs
index 904bd936..3ea4a915 100644
--- a/src/Infrastructure/BotSharp.Abstraction/Users/Models/UserActivationModel.cs
+++ b/src/Infrastructure/BotSharp.Abstraction/Users/Models/UserActivationModel.cs
@@ -4,4 +4,5 @@ public class UserActivationModel
 {
     public string UserName { get; set; }
     public string VerificationCode { get; set; }
+    public string RegionCode { get; set; } = "CN";
 }
diff --git a/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs b/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs
index 4cee45db..55e8c0cd 100644
--- a/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs
+++ b/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs
@@ -474,7 +474,7 @@ public class UserService : IUserService
         var record = id.Contains("@") ? db.GetUserByEmail(id) : db.GetUserByUserName(id);
         if (record == null)
         {
-            record = db.GetUserByPhone(id);
+            record = db.GetUserByPhone(id, regionCode: string.IsNullOrWhiteSpace(model.RegionCode) ? "CN" : model.RegionCode);
         }
 
         if (record == null)