diff --git a/src/Snap.Hutao/Snap.Hutao/Model/Binding/User/User.cs b/src/Snap.Hutao/Snap.Hutao/Model/Binding/User/User.cs
index e7427697..274137ec 100644
--- a/src/Snap.Hutao/Snap.Hutao/Model/Binding/User/User.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Model/Binding/User/User.cs
@@ -4,6 +4,7 @@
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Messaging;
 using Microsoft.Extensions.DependencyInjection;
+using Snap.Hutao.Migrations;
 using Snap.Hutao.Web.Hoyolab;
 using Snap.Hutao.Web.Hoyolab.Bbs.User;
 using Snap.Hutao.Web.Hoyolab.Passport;
@@ -103,7 +104,17 @@ internal sealed class User : ObservableObject
     internal static async Task<User> ResumeAsync(EntityUser inner, CancellationToken token = default)
     {
         User user = new(inner);
-        bool isOk = await user.InitializeCoreAsync(token).ConfigureAwait(false);
+        bool isOk = false;
+
+        // TODO: 这里暂时使用是否存在 stoken 来判断是否为国际服，需要改进
+        if (user.Entity.Stoken != null) 
+        {
+            isOk = await user.InitializeCoreAsync(token).ConfigureAwait(false);
+        }
+        else
+        {
+            isOk = await user.InitializeCoreOsAsync(token).ConfigureAwait(false);
+        }
 
         if (!isOk)
         {
@@ -141,6 +152,34 @@ internal sealed class User : ObservableObject
         }
     }
 
+    /// <summary>
+    /// 创建并初始化国际服用户（临时）
+    /// </summary>
+    /// <param name="cookie">cookie</param>
+    /// <param name="token">取消令牌</param>
+    /// <returns>用户</returns>
+    internal static async Task<User?> CreateOsUserAsync(Cookie cookie, CancellationToken token = default)
+    {
+        // 这里只负责创建实体用户，稍后在用户服务中保存到数据库
+        EntityUser entity = EntityUser.CreateOs(cookie);
+
+        // 临时使用 ltuid 代替 aid 与 mid
+        entity.Aid = cookie.GetValueOrDefault(Cookie.LTUID);
+        entity.Mid = cookie.GetValueOrDefault(Cookie.LTUID);
+
+        if (entity.Aid != null && entity.Mid != null)
+        {
+            User user = new(entity);
+            bool initialized = await user.InitializeCoreOsAsync(token).ConfigureAwait(false);
+
+            return initialized ? user : null;
+        }
+        else
+        {
+            return null;
+        }
+    }
+
     private async Task<bool> InitializeCoreAsync(CancellationToken token = default)
     {
         if (isInitialized)
@@ -234,4 +273,49 @@ internal sealed class User : ObservableObject
 
         return UserInfo != null && UserGameRoles.Any();
     }
+
+    private async Task<bool> InitializeCoreOsAsync(CancellationToken token = default)
+    {
+        if (isInitialized)
+        {
+            return true;
+        }
+
+        using (IServiceScope scope = Ioc.Default.CreateScope())
+        {
+            // 获取账户信息
+            Response<UserFullInfoWrapper> response = await scope.ServiceProvider
+                .GetRequiredService<UserClient>()
+                .GetOsUserFullInfoAsync(Entity, token)
+                .ConfigureAwait(false);
+            UserInfo = response.Data?.UserInfo;
+
+            // Ltoken 和 cookieToken 直接从网页或者输入获取
+            if (Ltoken == null || CookieToken == null)
+            {
+                return false;
+            }
+
+            // 获取游戏角色
+            Response<ListWrapper<UserGameRole>> userGameRolesResponse = await scope.ServiceProvider
+                .GetRequiredService<BindingClient>()
+                .GetOsUserGameRolesByCookieAsync(Entity, token)
+                .ConfigureAwait(false);
+
+            if (userGameRolesResponse.IsOk())
+            {
+                UserGameRoles = userGameRolesResponse.Data.List;
+            }
+            else
+            {
+                return false;
+            }
+        }
+
+        SelectedUserGameRole = UserGameRoles.FirstOrFirstOrDefault(role => role.IsChosen);
+
+        isInitialized = true;
+
+        return UserInfo != null && UserGameRoles.Any();
+    }
 }
diff --git a/src/Snap.Hutao/Snap.Hutao/Model/Entity/User.cs b/src/Snap.Hutao/Snap.Hutao/Model/Entity/User.cs
index 71d614a1..0451a335 100644
--- a/src/Snap.Hutao/Snap.Hutao/Model/Entity/User.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Model/Entity/User.cs
@@ -3,6 +3,7 @@
 
 using Snap.Hutao.Core.Database;
 using Snap.Hutao.Web.Hoyolab;
+using System;
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
 
@@ -65,4 +66,18 @@ internal sealed class User : ISelectable
 
         return new() { Stoken = stoken, Ltoken = ltoken, CookieToken = cookieToken };
     }
+
+    /// <summary>
+    /// 创建一个国际服用户
+    /// </summary>
+    /// <param name="cookie">cookie</param>
+    /// <returns>新创建的用户</returns>
+    public static User CreateOs(Cookie cookie)
+    {
+        // 不需要 Stoken
+        _ = cookie.TryGetAsLtoken(out Cookie? ltoken);
+        _ = cookie.TryGetAsOsCookieToken(out Cookie? cookieToken);
+
+        return new() { Ltoken = ltoken, CookieToken = cookieToken };
+    }
 }
\ No newline at end of file
diff --git a/src/Snap.Hutao/Snap.Hutao/Service/User/IUserService.cs b/src/Snap.Hutao/Snap.Hutao/Service/User/IUserService.cs
index 8546d4a8..e090d37b 100644
--- a/src/Snap.Hutao/Snap.Hutao/Service/User/IUserService.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Service/User/IUserService.cs
@@ -48,6 +48,13 @@ internal interface IUserService
     /// <returns>处理的结果</returns>
     Task<ValueResult<UserOptionResult, string>> ProcessInputCookieAsync(Cookie cookie);
 
+    /// <summary>
+    /// 尝试异步处理输入的国际服 Cookie
+    /// </summary>
+    /// <param name="cookie">Cookie</param>
+    /// <returns>处理的结果</returns>
+    Task<ValueResult<UserOptionResult, string>> ProcessInputOsCookieAsync(Cookie cookie);
+
     /// <summary>
     /// 异步刷新 Cookie 的 CookieToken
     /// </summary>
diff --git a/src/Snap.Hutao/Snap.Hutao/Service/User/UserService.cs b/src/Snap.Hutao/Snap.Hutao/Service/User/UserService.cs
index 8d2ebc24..346daac3 100644
--- a/src/Snap.Hutao/Snap.Hutao/Service/User/UserService.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Service/User/UserService.cs
@@ -225,7 +225,46 @@ internal class UserService : IUserService
         }
         else
         {
-            return await TryCreateUserAndAddAsync(cookie).ConfigureAwait(false);
+            return await TryCreateUserAndAddAsync(cookie, false).ConfigureAwait(false);
+        }
+    }
+
+    /// <inheritdoc/>
+    public async Task<ValueResult<UserOptionResult, string>> ProcessInputOsCookieAsync(Cookie cookie)
+    {
+        await ThreadHelper.SwitchToBackgroundAsync();
+        string? ltuid = cookie.GetValueOrDefault(Cookie.LTUID);
+
+        if (ltuid == null)
+        {
+            return new(UserOptionResult.Invalid, SH.ServiceUserProcessCookieNoMid);
+        }
+
+        // 检查 ltuid 对应用户是否存在
+        if (TryGetUser(userCollection!, ltuid, out BindingUser? user))
+        {
+            using (IServiceScope scope = scopeFactory.CreateScope())
+            {
+                AppDbContext appDbContext = scope.ServiceProvider.GetRequiredService<AppDbContext>();
+
+                if (cookie.TryGetAsLtoken(out Cookie? ltoken))
+                {
+                    user.Stoken = null;
+                    user.Ltoken = user.Ltoken;
+                    user.CookieToken = cookie.TryGetAsOsCookieToken(out Cookie? cookieToken) ? cookieToken : user.CookieToken;
+
+                    await appDbContext.Users.UpdateAndSaveAsync(user.Entity).ConfigureAwait(false);
+                    return new(UserOptionResult.Updated, ltuid);
+                }
+                else
+                {
+                    return new(UserOptionResult.Invalid, SH.ServiceUserProcessCookieNoStoken);
+                }
+            }
+        }
+        else
+        {
+            return await TryCreateUserAndAddAsync(cookie, true).ConfigureAwait(false);
         }
     }
 
@@ -265,14 +304,24 @@ internal class UserService : IUserService
         return user != null;
     }
 
-    private async Task<ValueResult<UserOptionResult, string>> TryCreateUserAndAddAsync(Cookie cookie)
+    private async Task<ValueResult<UserOptionResult, string>> TryCreateUserAndAddAsync(Cookie cookie, bool isOversea)
     {
         await ThreadHelper.SwitchToBackgroundAsync();
         using (IServiceScope scope = scopeFactory.CreateScope())
         {
             AppDbContext appDbContext = scope.ServiceProvider.GetRequiredService<AppDbContext>();
+            BindingUser? newUser;
+
+            // 判断是否为国际服
+            if (isOversea)
+            {
+                newUser = await BindingUser.CreateOsUserAsync(cookie).ConfigureAwait(false);
+            }
+            else
+            {
+                newUser = await BindingUser.CreateAsync(cookie).ConfigureAwait(false);
+            }
 
-            BindingUser? newUser = await BindingUser.CreateAsync(cookie).ConfigureAwait(false);
             if (newUser != null)
             {
                 // Sync cache
diff --git a/src/Snap.Hutao/Snap.Hutao/View/UserView.xaml b/src/Snap.Hutao/Snap.Hutao/View/UserView.xaml
index 8bd5f811..69f3a20a 100644
--- a/src/Snap.Hutao/Snap.Hutao/View/UserView.xaml
+++ b/src/Snap.Hutao/Snap.Hutao/View/UserView.xaml
@@ -225,6 +225,19 @@
                                 Icon="{shcm:FontIcon Glyph=&#xE710;}"
                                 Label="{shcm:ResourceString Name=ViewUserCookieOperationManualInputAction}"/>
                         </StackPanel>
+                        <TextBlock
+                            Margin="10,6,0,6"
+                            Style="{StaticResource BaseTextBlockStyle}"
+                            Text="HoyoVerse Account"/>
+                        <StackPanel
+                            Margin="0,0,6,0"
+                            HorizontalAlignment="Right"
+                            Orientation="Horizontal">
+                            <AppBarButton
+                                Command="{Binding AddOsUserCommand}"
+                                Icon="{shcm:FontIcon Glyph=&#xE710;}"
+                                Label="{shcm:ResourceString Name=ViewUserCookieOperationManualInputAction}"/>
+                        </StackPanel>
                     </StackPanel>
                 </Flyout>
             </Button.Flyout>
diff --git a/src/Snap.Hutao/Snap.Hutao/ViewModel/UserViewModel.cs b/src/Snap.Hutao/Snap.Hutao/ViewModel/UserViewModel.cs
index 1d8164d1..8cb5eb2d 100644
--- a/src/Snap.Hutao/Snap.Hutao/ViewModel/UserViewModel.cs
+++ b/src/Snap.Hutao/Snap.Hutao/ViewModel/UserViewModel.cs
@@ -46,6 +46,7 @@ internal sealed class UserViewModel : ObservableObject
 
         OpenUICommand = new AsyncRelayCommand(OpenUIAsync);
         AddUserCommand = new AsyncRelayCommand(AddUserAsync);
+        AddOsUserCommand = new AsyncRelayCommand(AddOsUserAsync);
         LoginMihoyoUserCommand = new RelayCommand(LoginMihoyoUser);
         RemoveUserCommand = new AsyncRelayCommand<User>(RemoveUserAsync);
         CopyCookieCommand = new RelayCommand<User>(CopyCookie);
@@ -87,6 +88,11 @@ internal sealed class UserViewModel : ObservableObject
     /// </summary>
     public ICommand AddUserCommand { get; }
 
+    /// <summary>
+    /// 添加国际服用户命令
+    /// </summary>
+    public ICommand AddOsUserCommand { get; }
+
     /// <summary>
     /// 登录米游社命令
     /// </summary>
@@ -161,6 +167,47 @@ internal sealed class UserViewModel : ObservableObject
         }
     }
 
+    private async Task AddOsUserAsync()
+    {
+        // ContentDialog must be created by main thread.
+        await ThreadHelper.SwitchToMainThreadAsync();
+
+        // Get cookie from user input
+        ValueResult<bool, string> result = await new UserDialog().GetInputCookieAsync().ConfigureAwait(false);
+
+        // User confirms the input
+        if (result.IsOk)
+        {
+            Cookie cookie = Cookie.Parse(result.Value);
+
+            (UserOptionResult optionResult, string uid) = await userService.ProcessInputOsCookieAsync(cookie).ConfigureAwait(false);
+
+            switch (optionResult)
+            {
+                case UserOptionResult.Added:
+                    if (Users!.Count == 1)
+                    {
+                        await ThreadHelper.SwitchToMainThreadAsync();
+                        SelectedUser = Users.Single();
+                    }
+
+                    infoBarService.Success(string.Format(SH.ViewModelUserAdded, uid));
+                    break;
+                case UserOptionResult.Incomplete:
+                    infoBarService.Information(SH.ViewModelUserIncomplete);
+                    break;
+                case UserOptionResult.Invalid:
+                    infoBarService.Information(SH.ViewModelUserInvalid);
+                    break;
+                case UserOptionResult.Updated:
+                    infoBarService.Success(string.Format(SH.ViewModelUserUpdated, uid));
+                    break;
+                default:
+                    throw Must.NeverHappen();
+            }
+        }
+    }
+
     private void LoginMihoyoUser()
     {
         if (Core.WebView2Helper.IsSupported)
diff --git a/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Bbs/User/UserClient.cs b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Bbs/User/UserClient.cs
index 8c9f8e06..f09ecbbd 100644
--- a/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Bbs/User/UserClient.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Bbs/User/UserClient.cs
@@ -52,4 +52,22 @@ internal sealed class UserClient
 
         return Response.Response.DefaultIfNull(resp);
     }
+
+    /// <summary>
+    /// 获取当前用户详细信息
+    /// </summary>
+    /// <param name="user">用户</param>
+    /// <param name="token">取消令牌</param>
+    /// <returns>详细信息</returns>
+    [ApiInformation(Cookie = CookieType.Stoken, Salt = SaltType.K2)]
+    public async Task<Response<UserFullInfoWrapper>> GetOsUserFullInfoAsync(Model.Entity.User user, CancellationToken token = default)
+    {
+        Response<UserFullInfoWrapper>? resp = await httpClient
+            .SetUser(user, CookieType.Cookie)
+            .UseDynamicSecret(DynamicSecretVersion.Gen1, SaltType.OS, false)
+            .TryCatchGetFromJsonAsync<Response<UserFullInfoWrapper>>(ApiOsEndpoints.UserFullInfoQuery(user.Aid!), options, logger, token)
+            .ConfigureAwait(false);
+
+        return Response.Response.DefaultIfNull(resp);
+    }
 }
\ No newline at end of file
diff --git a/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Cookie.cs b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Cookie.cs
index 846117ea..0fd7ec68 100644
--- a/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Cookie.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Cookie.cs
@@ -156,6 +156,26 @@ internal sealed partial class Cookie
         return false;
     }
 
+    public bool TryGetAsOsCookieToken([NotNullWhen(true)] out Cookie? cookie)
+    {
+        bool hasLtUid = TryGetValue(LTUID, out string? ltUid);
+        bool hasCookieToken = TryGetValue(COOKIE_TOKEN, out string? cookieToken);
+
+        if (hasLtUid && hasCookieToken)
+        {
+            cookie = new Cookie(new()
+            {
+                [LTUID] = ltUid!,
+                [COOKIE_TOKEN] = cookieToken!,
+            });
+
+            return true;
+        }
+
+        cookie = null;
+        return false;
+    }
+
     /// <inheritdoc cref="Dictionary{TKey, TValue}.TryGetValue(TKey, out TValue)"/>
     public bool TryGetValue(string key, [NotNullWhen(true)] out string? value)
     {
diff --git a/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Takumi/Binding/BindingClient.cs b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Takumi/Binding/BindingClient.cs
index e41972a0..01217854 100644
--- a/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Takumi/Binding/BindingClient.cs
+++ b/src/Snap.Hutao/Snap.Hutao/Web/Hoyolab/Takumi/Binding/BindingClient.cs
@@ -52,4 +52,23 @@ internal sealed class BindingClient
 
         return Response.Response.DefaultIfNull(resp);
     }
+
+    /// <summary>
+    /// 获取国际服用户角色信息
+    /// </summary>
+    /// <param name="user">用户</param>
+    /// <param name="token">取消令牌</param>
+    /// <returns>用户角色信息</returns>
+    [ApiInformation(Cookie = CookieType.Ltoken)]
+    public async Task<Response<ListWrapper<UserGameRole>>> GetOsUserGameRolesByCookieAsync(User user, CancellationToken token = default)
+    {
+        string url = ApiOsEndpoints.UserGameRolesByCookie;
+
+        Response<ListWrapper<UserGameRole>>? resp = await httpClient
+            .SetUser(user, CookieType.Ltoken)
+            .TryCatchGetFromJsonAsync<Response<ListWrapper<UserGameRole>>>(url, options, logger, token)
+            .ConfigureAwait(false);
+
+        return Response.Response.DefaultIfNull(resp);
+    }
 }