diff --git a/Application/Application.csproj b/Application/Application.csproj
index a11bca2..4fb7069 100644
--- a/Application/Application.csproj
+++ b/Application/Application.csproj
@@ -21,4 +21,10 @@
       <PackageReference Include="Throw" Version="1.3.1" />
     </ItemGroup>
 
+    <ItemGroup>
+      <Folder Include="Game\Card\OnlineMatching" />
+      <Folder Include="Game\Card\Read" />
+      <Folder Include="Game\Card\Write" />
+    </ItemGroup>
+
 </Project>
diff --git a/Application/Common/Extensions/XmlSerializationExtensions.cs b/Application/Common/Extensions/XmlSerializationExtensions.cs
index 5e5efc2..ae5240a 100644
--- a/Application/Common/Extensions/XmlSerializationExtensions.cs
+++ b/Application/Common/Extensions/XmlSerializationExtensions.cs
@@ -1,7 +1,8 @@
-using ChoETL;
+using System.Text;
+using ChoETL;
 using Throw;
 
-namespace Application.Common;
+namespace Application.Common.Extensions;
 
 public static class XmlSerializationExtensions
 {
@@ -14,4 +15,24 @@ public static class XmlSerializationExtensions
 
         return result;
     }
+
+    public static string SerializeCardData<T>(this T source, string xpath) where T : class
+    {
+        var buffer = new StringBuilder();
+        using var writer = new ChoXmlWriter<T>(buffer).WithXPath(xpath).UseXmlSerialization();
+        writer.Configuration.OmitXmlDeclaration = false;
+        writer.Configuration.DoNotEmitXmlNamespace = true;
+        writer.Write(source);
+        return buffer.ToString();
+    }
+
+    public static string SerializeCardDataList<T>(this IEnumerable<T> source, string xpath) where T : class
+    {
+        var buffer = new StringBuilder();
+        using var writer = new ChoXmlWriter<T>(buffer).WithXPath(xpath).UseXmlSerialization();
+        writer.Configuration.OmitXmlDeclaration = false;
+        writer.Configuration.DoNotEmitXmlNamespace = true;
+        writer.Write(source);
+        return buffer.ToString();
+    }
 }
\ No newline at end of file
diff --git a/Application/Dto/SessionDto.cs b/Application/Dto/SessionDto.cs
new file mode 100644
index 0000000..abc508d
--- /dev/null
+++ b/Application/Dto/SessionDto.cs
@@ -0,0 +1,21 @@
+using System.Xml.Serialization;
+
+namespace Application.Dto;
+
+public class SessionDto
+{
+    [XmlElement(ElementName = "card_id")]
+    public long CardId { get; set; }
+
+    [XmlElement(ElementName = "mac_addr")] 
+    public string Mac { get; set; } = "000000000000";
+
+    [XmlElement(ElementName = "session_id")]
+    public string SessionId { get; set; } = "12345678901234567890123456789012";
+
+    [XmlElement(ElementName = "expires")]
+    public int Expires { get; set; }
+
+    [XmlElement(ElementName = "player_id")]
+    public int PlayerId { get; set; }
+}
\ No newline at end of file
diff --git a/Application/Game/Card/CardRegisterCommand.cs b/Application/Game/Card/Management/CardRegisterCommand.cs
similarity index 87%
rename from Application/Game/Card/CardRegisterCommand.cs
rename to Application/Game/Card/Management/CardRegisterCommand.cs
index 1d94fc5..becefff 100644
--- a/Application/Game/Card/CardRegisterCommand.cs
+++ b/Application/Game/Card/Management/CardRegisterCommand.cs
@@ -1,14 +1,10 @@
-using Application.Common;
-using Application.Common.Exceptions;
+using Application.Common.Extensions;
 using Application.Common.Models;
 using Application.Dto;
 using Application.Interfaces;
 using Application.Mappers;
-using MediatR;
-using Microsoft.Extensions.Logging;
-using Throw;
 
-namespace Application.Game.Card;
+namespace Application.Game.Card.Management;
 
 public record CardRegisterCommand(long CardId, string Data) : IRequestWrapper<string>;
 
diff --git a/Application/Game/Card/Management/CardReissueCommand.cs b/Application/Game/Card/Management/CardReissueCommand.cs
new file mode 100644
index 0000000..4fd7e91
--- /dev/null
+++ b/Application/Game/Card/Management/CardReissueCommand.cs
@@ -0,0 +1,21 @@
+using Application.Common.Models;
+using Application.Interfaces;
+using Domain.Enums;
+
+namespace Application.Game.Card.Management;
+
+public record CardReissueCommand(long CardId) : IRequestWrapper<string>;
+
+public class CardReissueCommandHandler : CardRequestHandlerBase<CardReissueCommand, string>
+{
+    public CardReissueCommandHandler(ICardDependencyAggregate aggregate) : base(aggregate)
+    {
+    }
+
+    public override Task<ServiceResult<string>> Handle(CardReissueCommand request, CancellationToken cancellationToken)
+    {
+        // TODO: Support actual reissue
+        var result = $"{(int)CardReturnCode.NotReissue}";
+        return Task.FromResult(new ServiceResult<string>(result));
+    }
+}
\ No newline at end of file
diff --git a/Application/Game/Card/Session/GetSessionCommand.cs b/Application/Game/Card/Session/GetSessionCommand.cs
new file mode 100644
index 0000000..7c23ad4
--- /dev/null
+++ b/Application/Game/Card/Session/GetSessionCommand.cs
@@ -0,0 +1,30 @@
+using Application.Common.Extensions;
+using Application.Common.Models;
+using Application.Dto;
+using Application.Interfaces;
+
+namespace Application.Game.Card.Session;
+
+public record GetSessionCommand(long CardId, string Mac) : IRequestWrapper<string>;
+
+public class GetSessionCommandHandler : CardRequestHandlerBase<GetSessionCommand, string>
+{
+    private const string SESSION_XPATH = "/root/session";
+    
+    public GetSessionCommandHandler(ICardDependencyAggregate aggregate) : base(aggregate)
+    {
+    }
+
+    public override Task<ServiceResult<string>> Handle(GetSessionCommand request, CancellationToken cancellationToken)
+    {
+        var session = new SessionDto
+        {
+            CardId = request.CardId,
+            Mac = request.Mac,
+            PlayerId = 1,
+            Expires = 9999,
+            SessionId = "12345678901234567890123456789012"
+        };
+        return Task.FromResult(new ServiceResult<string>(session.SerializeCardData(SESSION_XPATH)));
+    }
+}
\ No newline at end of file
diff --git a/Domain/Enums/CardCommandType.cs b/Domain/Enums/CardCommandType.cs
index 2bb09ff..44a9a07 100644
--- a/Domain/Enums/CardCommandType.cs
+++ b/Domain/Enums/CardCommandType.cs
@@ -1,4 +1,4 @@
-namespace Domain;
+namespace Domain.Enums;
 
 public enum CardCommandType
 {
diff --git a/Domain/Enums/CardRequestType.cs b/Domain/Enums/CardRequestType.cs
index c593f45..46fd8a9 100644
--- a/Domain/Enums/CardRequestType.cs
+++ b/Domain/Enums/CardRequestType.cs
@@ -1,4 +1,4 @@
-namespace Domain;
+namespace Domain.Enums;
 
 public enum CardRequestType
 {
diff --git a/Domain/Enums/CardReturnCode.cs b/Domain/Enums/CardReturnCode.cs
index 341e4f8..46b9a33 100644
--- a/Domain/Enums/CardReturnCode.cs
+++ b/Domain/Enums/CardReturnCode.cs
@@ -1,4 +1,4 @@
-namespace Domain;
+namespace Domain.Enums;
 
 public enum CardReturnCode
 {
@@ -23,5 +23,5 @@ public enum CardReturnCode
     /// <summary>
     /// Server side validation error
     /// </summary>
-    Unknown = 999
+    Unknown = -1
 }
\ No newline at end of file
diff --git a/MainServer/Controllers/Game/CardController.cs b/MainServer/Controllers/Game/CardController.cs
index 85eb907..99c889d 100644
--- a/MainServer/Controllers/Game/CardController.cs
+++ b/MainServer/Controllers/Game/CardController.cs
@@ -1,7 +1,10 @@
 using System.Net;
 using Application.Common.Models;
 using Application.Game.Card;
+using Application.Game.Card.Management;
+using Application.Game.Card.Session;
 using Domain;
+using Domain.Enums;
 using Microsoft.AspNetCore.Mvc;
 using Throw;
 
@@ -28,6 +31,7 @@ public class CardController : BaseController<CardController>
         switch (cardCommandType)
         {
             case CardCommandType.CardReadRequest:
+            case CardCommandType.CardWriteRequest:
             {
                 switch (cardRequestType)
                 {
@@ -72,8 +76,8 @@ public class CardController : BaseController<CardController>
                     case CardRequestType.ReadTotalTrophy:
                         break;
                     case CardRequestType.GetSession:
-                        break;
                     case CardRequestType.StartSession:
+                        result = await Mediator.Send(new GetSessionCommand(request.CardId, request.Mac));
                         break;
                     case CardRequestType.WriteCard:
                         
@@ -111,12 +115,11 @@ public class CardController : BaseController<CardController>
                 }
                 break;
             }
-            case CardCommandType.CardWriteRequest:
-                break;
             case CardCommandType.RegisterRequest:
                 result = await Mediator.Send(new CardRegisterCommand(request.CardId, request.Data));
                 break;
             case CardCommandType.ReissueRequest:
+                result = await Mediator.Send(new CardReissueCommand(request.CardId));
                 break;
             default:
                 throw new ArgumentOutOfRangeException(message: "Should not happen", paramName:null);