diff --git a/src/Luban.Job.Cfg/Source/TypeVisitors/CsJsonDeserialize.cs b/src/Luban.Job.Cfg/Source/TypeVisitors/CsJsonDeserialize.cs
index 1358f96..4cf1a55 100644
--- a/src/Luban.Job.Cfg/Source/TypeVisitors/CsJsonDeserialize.cs
+++ b/src/Luban.Job.Cfg/Source/TypeVisitors/CsJsonDeserialize.cs
@@ -8,7 +8,6 @@ namespace Luban.Job.Cfg.TypeVisitors
     class CsJsonDeserialize : ITypeFuncVisitor<string, string, string>
     {
         public static CsJsonDeserialize Ins { get; } = new();
-        public int Flag { get; set; }
         public string Accept(TBool type, string json, string x)
         {
             return $"{x} = {json}.GetBoolean();";
@@ -86,12 +85,12 @@ namespace Luban.Job.Cfg.TypeVisitors
 
         public string Accept(TArray type, string json, string x)
         {
-            Flag++;
-            string _n = $"_n{Flag}";
-            string __e = $"__e{Flag}";
-            string __v = $"__v{Flag}";
-            string __json = $"__json{Flag}";
-            string __index = $"__index{Flag}";
+            int level = type.CollectionLevel;
+            string _n = $"_n{level}";
+            string __e = $"__e{level}";
+            string __v = $"__v{level}";
+            string __json = $"__json{level}";
+            string __index = $"__index{level}";
             string typeStr = $"{type.ElementType.Apply(CsDefineTypeName.Ins)}[{_n}]";
             if (type.Dimension > 1)
             {
@@ -110,21 +109,19 @@ namespace Luban.Job.Cfg.TypeVisitors
 
         public string Accept(TList type, string json, string x)
         {
-            Flag++;
-            string _n = $"_n{Flag}";
-            string __e = $"__e{Flag}";
-            string __v = $"__v{Flag}";
-            string __json = $"__json{Flag}";
+            int level = type.CollectionLevel;
+            string __e = $"__e{level}";
+            string __v = $"__v{level}";
+            string __json = $"__json{level}";
             return $"{{ var {__json} = {json}; {x} = new {type.CsUnderingDefineType()}({__json}.GetArrayLength()); foreach(JsonElement {__e} in {__json}.EnumerateArray()) {{ {type.ElementType.CsUnderingDefineType()} {__v};  {type.ElementType.Apply(this, $"{__e}", $"{__v}")}  {x}.Add({__v}); }}   }}";
         }
 
         public string Accept(TSet type, string json, string x)
         {
-            Flag++;
-            string _n = $"_n{Flag}";
-            string __e = $"__e{Flag}";
-            string __v = $"__v{Flag}";
-            string __json = $"__json{Flag}";
+            int level = type.CollectionLevel;
+            string __e = $"__e{level}";
+            string __v = $"__v{level}";
+            string __json = $"__json{level}";
             return $"{{ var {__json} = {json}; {x} = new {type.CsUnderingDefineType()}({__json}.GetArrayLength()); foreach(JsonElement {__e} in {__json}.EnumerateArray()) {{ {type.ElementType.CsUnderingDefineType()} {__v};  {type.ElementType.Apply(this, $"{__e}", $"{__v}")}  {x}.Add({__v}); }}   }}";
         }
 
diff --git a/src/Luban.Job.Cfg/Source/TypeVisitors/CsUnityJsonDeserialize.cs b/src/Luban.Job.Cfg/Source/TypeVisitors/CsUnityJsonDeserialize.cs
index 668fd73..1f15b32 100644
--- a/src/Luban.Job.Cfg/Source/TypeVisitors/CsUnityJsonDeserialize.cs
+++ b/src/Luban.Job.Cfg/Source/TypeVisitors/CsUnityJsonDeserialize.cs
@@ -8,7 +8,6 @@ namespace Luban.Job.Cfg.TypeVisitors
     class CsUnityJsonDeserialize : ITypeFuncVisitor<string, string, string>
     {
         public static CsUnityJsonDeserialize Ins { get; } = new();
-        public int Flag { get; set; }
 
         public string Accept(TBool type, string json, string x)
         {
@@ -87,12 +86,12 @@ namespace Luban.Job.Cfg.TypeVisitors
 
         public string Accept(TArray type, string json, string x)
         {
-            Flag++;
-            string _n = $"_n{Flag}";
-            string __e = $"__e{Flag}";
-            string __v = $"__v{Flag}";
-            string __json = $"__json{Flag}";
-            string __index = $"__index{Flag}";
+            int level = type.CollectionLevel;
+            string _n = $"_n{level}";
+            string __e = $"__e{level}";
+            string __v = $"__v{level}";
+            string __json = $"__json{level}";
+            string __index = $"__index{level}";
             string tempJsonName = __json;
             string typeStr = $"{type.ElementType.Apply(CsDefineTypeName.Ins)}[{_n}]";
             if (type.Dimension > 1)
@@ -112,20 +111,20 @@ namespace Luban.Job.Cfg.TypeVisitors
 
         public string Accept(TList type, string json, string x)
         {
-            Flag++;
-            string __e = $"__e{Flag}";
-            string __v = $"__v{Flag}";
-            string __json = $"__json{Flag}";
+            int level = type.CollectionLevel;
+            string __e = $"__e{level}";
+            string __v = $"__v{level}";
+            string __json = $"__json{level}";
             string tempJsonName = __json;
             return $"{{ var {tempJsonName} = {json}; if(!{tempJsonName}.IsArray) {{ throw new SerializationException(); }} {x} = new {type.CsUnderingDefineType()}({tempJsonName}.Count); foreach(JSONNode {__e} in {tempJsonName}.Children) {{ {type.ElementType.CsUnderingDefineType()} {__v};  {type.ElementType.Apply(this, __e, __v)}  {x}.Add({__v}); }}   }}";
         }
 
         public string Accept(TSet type, string json, string x)
         {
-            Flag++;
-            string __e = $"__e{Flag}";
-            string __v = $"__v{Flag}";
-            string __json = $"__json{Flag}";
+            int level = type.CollectionLevel;
+            string __e = $"__e{level}";
+            string __v = $"__v{level}";
+            string __json = $"__json{level}";
             string tempJsonName = __json;
             return $"{{ var {tempJsonName} = {json}; if(!{tempJsonName}.IsArray) {{ throw new SerializationException(); }} {x} = new {type.CsUnderingDefineType()}(/*{tempJsonName}.Count*/); foreach(JSONNode {__e} in {tempJsonName}.Children) {{ {type.ElementType.CsUnderingDefineType()} {__v};  {type.ElementType.Apply(this, __e, __v)}  {x}.Add({__v}); }}   }}";
         }
diff --git a/src/Luban.Job.Common/Source/TypeVisitors/CsUnderingDeserializeVisitor.cs b/src/Luban.Job.Common/Source/TypeVisitors/CsUnderingDeserializeVisitor.cs
index 3e67aad..f56701c 100644
--- a/src/Luban.Job.Common/Source/TypeVisitors/CsUnderingDeserializeVisitor.cs
+++ b/src/Luban.Job.Common/Source/TypeVisitors/CsUnderingDeserializeVisitor.cs
@@ -7,7 +7,6 @@ namespace Luban.Job.Common.TypeVisitors
     class CsUnderingDeserializeVisitor : ITypeFuncVisitor<string, string, string>
     {
         public static CsUnderingDeserializeVisitor Ins { get; } = new CsUnderingDeserializeVisitor();
-        public int Flag { get; set; }
 
         public string Accept(TBool type, string bufName, string fieldName)
         {
@@ -87,10 +86,10 @@ namespace Luban.Job.Common.TypeVisitors
 
         public string Accept(TArray type, string bufName, string fieldName)
         {
-            Flag++;
-            string __n = $"__n{Flag}";
-            string __e = $"__e{Flag}";
-            string __index = $"__index{Flag}";
+            int level = type.CollectionLevel;
+            string __n = $"__n{level}";
+            string __e = $"__e{level}";
+            string __index = $"__index{level}";
             string typeStr = $"{type.ElementType.Apply(CsDefineTypeName.Ins)}[{__n}]";
             if (type.Dimension > 1)
             {
@@ -109,19 +108,19 @@ namespace Luban.Job.Common.TypeVisitors
 
         public string Accept(TList type, string bufName, string fieldName)
         {
-            Flag++;
-            string n = $"n{Flag}";
-            string _e = $"_e{Flag}";
-            string i = $"i{Flag}";
+            int level = type.CollectionLevel;
+            string n = $"n{level}";
+            string _e = $"_e{level}";
+            string i = $"i{level}";
             return $"{{int {n} = System.Math.Min({bufName}.ReadSize(), {bufName}.Size);{fieldName} = new {type.Apply(CsDefineTypeName.Ins)}({n});for(var {i} = 0 ; {i} < {n} ; {i}++) {{ {type.ElementType.Apply(CsDefineTypeName.Ins)} {_e};  {type.ElementType.Apply(this, bufName, $"{_e}")} {fieldName}.Add({_e});}}}}";
         }
 
         public string Accept(TSet type, string bufName, string fieldName)
         {
-            Flag++;
-            string n = $"n{Flag}";
-            string _e = $"_e{Flag}";
-            string i = $"i{Flag}";
+            int level = type.CollectionLevel;
+            string n = $"n{level}";
+            string _e = $"_e{level}";
+            string i = $"i{level}";
             return $"{{int {n} = System.Math.Min({bufName}.ReadSize(), {bufName}.Size);{fieldName} = new {type.Apply(CsDefineTypeName.Ins)}(/*{n} * 3 / 2*/);for(var {i} = 0 ; {i} < {n} ; {i}++) {{ {type.ElementType.Apply(CsDefineTypeName.Ins)} {_e};  {type.ElementType.Apply(this, bufName, $"{_e}")} {fieldName}.Add({_e});}}}}";
         }
 
diff --git a/src/Luban.Job.Common/Source/Types/TArray.cs b/src/Luban.Job.Common/Source/Types/TArray.cs
index 5bf73f6..ade143f 100644
--- a/src/Luban.Job.Common/Source/Types/TArray.cs
+++ b/src/Luban.Job.Common/Source/Types/TArray.cs
@@ -16,7 +16,6 @@ namespace Luban.Job.Common.Types
 
         public override string TypeName => "array";
         public int Dimension { get; } = 1;
-        public TType FinalElementType { get; }
 
         private TArray(bool isNullable, Dictionary<string, string> tags, TType elementType) : base(isNullable, tags)
         {
@@ -24,11 +23,16 @@ namespace Luban.Job.Common.Types
             if (!elementType.IsCollection)
             {
                 FinalElementType = ElementType;
+                CollectionLevel = 0;
+            }
+            else
+            {
+                CollectionLevel = ElementType.CollectionLevel + 1;
+                FinalElementType = ElementType.FinalElementType;
             }
             if (ElementType.TypeName == "array")
             {
                 Dimension = (ElementType as TArray).Dimension + 1;
-                FinalElementType = (ElementType as TArray).FinalElementType;
             }
         }
 
diff --git a/src/Luban.Job.Common/Source/Types/TList.cs b/src/Luban.Job.Common/Source/Types/TList.cs
index bfce885..611b202 100644
--- a/src/Luban.Job.Common/Source/Types/TList.cs
+++ b/src/Luban.Job.Common/Source/Types/TList.cs
@@ -22,6 +22,16 @@ namespace Luban.Job.Common.Types
         {
             ElementType = elementType;
             IsArrayList = isArrayList;
+            if (!elementType.IsCollection)
+            {
+                FinalElementType = ElementType;
+                CollectionLevel = 0;
+            }
+            else
+            {
+                CollectionLevel = ElementType.CollectionLevel + 1;
+                FinalElementType = ElementType.FinalElementType;
+            }
         }
 
         public override bool TryParseFrom(string s)
diff --git a/src/Luban.Job.Common/Source/Types/TSet.cs b/src/Luban.Job.Common/Source/Types/TSet.cs
index 180c172..3e6102d 100644
--- a/src/Luban.Job.Common/Source/Types/TSet.cs
+++ b/src/Luban.Job.Common/Source/Types/TSet.cs
@@ -22,6 +22,16 @@ namespace Luban.Job.Common.Types
         {
             ElementType = elementType;
             IsOrderSet = isOrderSet;
+            if (!elementType.IsCollection)
+            {
+                FinalElementType = ElementType;
+                CollectionLevel = 0;
+            }
+            else
+            {
+                CollectionLevel = ElementType.CollectionLevel + 1;
+                FinalElementType = ElementType.FinalElementType;
+            }
         }
 
         public override bool TryParseFrom(string s)
diff --git a/src/Luban.Job.Common/Source/Types/TType.cs b/src/Luban.Job.Common/Source/Types/TType.cs
index b05313e..f81c57e 100644
--- a/src/Luban.Job.Common/Source/Types/TType.cs
+++ b/src/Luban.Job.Common/Source/Types/TType.cs
@@ -19,6 +19,8 @@ namespace Luban.Job.Common.Types
         }
 
         public abstract string TypeName { get; }
+        public TType FinalElementType { get; protected set; }
+        public int CollectionLevel { get; protected set; }
 
         public bool HasTag(string attrName)
         {