diff --git a/src/Luban.Job.Cfg/Source/Generate/CppCodeBinRender.cs b/src/Luban.Job.Cfg/Source/Generate/CppCodeBinRender.cs
index e6d1909..5716eb1 100644
--- a/src/Luban.Job.Cfg/Source/Generate/CppCodeBinRender.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/CppCodeBinRender.cs
@@ -40,9 +40,11 @@ namespace Luban.Job.Cfg.Generate
     hierarchy_export_fields = x.hierarchy_export_fields
 }}
 
+{{~if x.comment != '' ~}}
 /**
-{{x.comment}}
+ * {{x.comment}}
  */
+{{~end~}}
 class {{name}} : public {{if parent_def_type}} {{parent_def_type.cpp_full_name}} {{else}} bright::CfgBean {{end}}
 {
     public:
@@ -71,9 +73,11 @@ class {{name}} : public {{if parent_def_type}} {{parent_def_type.cpp_full_name}}
     bool deserialize(ByteBuf& _buf);
 
     {{~ for field in export_fields ~}}
+{{~if field.comment != '' ~}}
     /**
-     {{field.comment}}
+     * {{field.comment}}
      */
+{{~end~}}
     {{cpp_define_type field.ctype}} {{field.cpp_style_name}};
     {{~if field.index_field~}} 
     ::bright::HashMap<{{cpp_define_type field.index_field.ctype}}, {{cpp_define_type field.ctype.element_type}}> {{field.cpp_style_name}}_Index;
@@ -115,9 +119,11 @@ class {{name}} : public {{if parent_def_type}} {{parent_def_type.cpp_full_name}}
     value_type =  x.value_ttype
 ~}}
 
+{{~if x.comment != '' ~}}
 /**
-{{x.comment}}
+ * {{x.comment}}
  */
+{{~end~}}
 class {{name}}
 {
     {{~if x.is_map_table ~}}
@@ -185,9 +191,11 @@ class {{name}}
     }
 
     {{~ for field in value_type.bean.hierarchy_export_fields ~}}
+{{~if field.comment != '' ~}}
     /**
-    {{field.comment}}
+     * {{field.comment}}
      */
+{{~end~}}
     {{cpp_define_type field.ctype}}& {{field.cpp_getter_name}}() const { return _data->{{field.cpp_style_name}}; }
     {{~end~}}
     {{~end~}}
@@ -208,9 +216,11 @@ class {{name}}
 {
     public:
     {{~for table in tables ~}}
+{{~if table.comment != '' ~}}
     /**
      {{table.comment}}
      */
+{{~end~}}
      {{table.cpp_full_name}} {{table.name}};
     {{~end~}}
 
diff --git a/src/Luban.Job.Cfg/Source/Generate/CsCodeBinRender.cs b/src/Luban.Job.Cfg/Source/Generate/CsCodeBinRender.cs
index 2601bfa..c06c796 100644
--- a/src/Luban.Job.Cfg/Source/Generate/CsCodeBinRender.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/CsCodeBinRender.cs
@@ -26,9 +26,11 @@ using System.Collections.Generic;
 namespace {{x.namespace_with_top_module}}
 {
 
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public {{x.cs_class_modifier}} partial class {{name}} : {{if parent_def_type}} {{x.parent}} {{else}} Bright.Config.BeanBase {{end}}
 {
     public {{name}}(ByteBuf _buf) {{if parent_def_type}} : base(_buf) {{end}}
@@ -73,9 +75,11 @@ public {{x.cs_class_modifier}} partial class {{name}} : {{if parent_def_type}} {
     }
 
     {{~ for field in export_fields ~}}
+{{~if field.comment != '' ~}}
     /// <summary>
     /// {{field.comment}}
     /// </summary>
+{{~end~}}
     public readonly {{cs_define_type field.ctype}} {{field.cs_style_name}};
     {{~if field.index_field~}} 
     public readonly Dictionary<{{cs_define_type field.index_field.ctype}}, {{cs_define_type field.ctype.element_type}}> {{field.cs_style_name}}_Index = new Dictionary<{{cs_define_type field.index_field.ctype}}, {{cs_define_type field.ctype.element_type}}>();
@@ -142,9 +146,11 @@ namespace {{x.namespace_with_top_module}}
         key_type2 =  x.key_ttype2
         value_type =  x.value_ttype
     }}
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public sealed partial class {{name}}
 {
     {{~if x.is_map_table ~}}
@@ -198,9 +204,11 @@ public sealed partial class {{name}}
 
 
     {{~ for field in value_type.bean.hierarchy_export_fields ~}}
+{{~if field.comment != '' ~}}
     /// <summary>
     /// {{field.comment}}
     /// </summary>
+{{~end~}}
      public {{cs_define_type field.ctype}} {{field.cs_style_name}} => _data.{{field.cs_style_name}};
     {{~if field.ref~}}
         public {{field.cs_ref_type_name}} {{field.cs_ref_var_name}} => _data.{{field.cs_ref_var_name}};
@@ -244,9 +252,11 @@ namespace {{namespace}}
 public sealed class {{name}}
 {
     {{~for table in tables ~}}
+{{~if table.comment != '' ~}}
     /// <summary>
     /// {{table.comment}}
     /// </summary>
+{{~end~}}
     public {{table.full_name}} {{table.name}} {get; }
     {{~end~}}
 
diff --git a/src/Luban.Job.Cfg/Source/Generate/CsCodeJsonRender.cs b/src/Luban.Job.Cfg/Source/Generate/CsCodeJsonRender.cs
index b874f56..954b9c0 100644
--- a/src/Luban.Job.Cfg/Source/Generate/CsCodeJsonRender.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/CsCodeJsonRender.cs
@@ -27,9 +27,11 @@ using System.Text.Json;
 namespace {{x.namespace_with_top_module}}
 {
 
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public {{x.cs_class_modifier}} partial class {{name}} : {{if parent_def_type}} {{parent}} {{else}} Bright.Config.BeanBase {{end}}
 {
     public {{name}}(JsonElement _json) {{if parent_def_type}} : base(_json) {{end}}
@@ -68,9 +70,11 @@ public {{x.cs_class_modifier}} partial class {{name}} : {{if parent_def_type}} {
     }
 
     {{~ for field in export_fields ~}}
+{{~if field.comment != '' ~}}
     /// <summary>
     /// {{field.comment}}
     /// </summary>
+{{~end~}}
     public readonly {{cs_define_type field.ctype}} {{field.cs_style_name}};
     {{~if field.index_field~}} 
     public readonly Dictionary<{{cs_define_type field.index_field.ctype}}, {{cs_define_type field.ctype.element_type}}> {{field.cs_style_name}}_Index = new Dictionary<{{cs_define_type field.index_field.ctype}}, {{cs_define_type field.ctype.element_type}}>();
@@ -139,9 +143,11 @@ using System.Text.Json;
 namespace {{x.namespace_with_top_module}}
 {
 
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public sealed partial class {{name}}
 {
     {{~if x.is_map_table ~}}
@@ -193,9 +199,11 @@ public sealed partial class {{name}}
     }
 
     {{~ for field in value_type.bean.hierarchy_export_fields ~}}
+{{~if field.comment != '' ~}}
     /// <summary>
     /// {{field.comment}}
     /// </summary>
+{{~end~}}
      public {{cs_define_type field.ctype}} {{field.cs_style_name}} => _data.{{field.cs_style_name}};
     {{~if field.ref~}}
         public {{field.cs_ref_type_name}} {{field.cs_ref_var_name}} => _data.{{field.cs_ref_var_name}};
@@ -239,9 +247,11 @@ namespace {{namespace}}
 public sealed partial class {{name}}
 {
     {{~for table in tables ~}}
+{{~if table.comment != '' ~}}
     /// <summary>
     /// {{table.comment}}
     /// </summary>
+{{~end~}}
     public {{table.full_name}} {{table.name}} {get; }
     {{~end~}}
 
diff --git a/src/Luban.Job.Cfg/Source/Generate/CsCodeUnityJsonRender.cs b/src/Luban.Job.Cfg/Source/Generate/CsCodeUnityJsonRender.cs
index adb06ad..ff9b031 100644
--- a/src/Luban.Job.Cfg/Source/Generate/CsCodeUnityJsonRender.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/CsCodeUnityJsonRender.cs
@@ -27,9 +27,11 @@ using SimpleJSON;
 namespace {{x.namespace_with_top_module}}
 {
 
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public {{x.cs_class_modifier}} partial class {{name}} : {{if parent_def_type}} {{parent}} {{else}} Bright.Config.BeanBase {{end}}
 {
     public {{name}}(JSONNode _json) {{if parent_def_type}} : base(_json) {{end}}
@@ -69,9 +71,11 @@ public {{x.cs_class_modifier}} partial class {{name}} : {{if parent_def_type}} {
     }
 
     {{~ for field in export_fields ~}}
+{{~if field.comment != '' ~}}
     /// <summary>
     /// {{field.comment}}
     /// </summary>
+{{~end~}}
     public readonly {{cs_define_type field.ctype}} {{field.cs_style_name}};
     {{~if field.index_field~}} 
     public readonly Dictionary<{{cs_define_type field.index_field.ctype}}, {{cs_define_type field.ctype.element_type}}> {{field.cs_style_name}}_Index = new Dictionary<{{cs_define_type field.index_field.ctype}}, {{cs_define_type field.ctype.element_type}}>();
@@ -140,9 +144,11 @@ using SimpleJSON;
 namespace {{x.namespace_with_top_module}}
 {
 
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public sealed partial class {{name}}
 {
     {{~if x.is_map_table ~}}
@@ -197,9 +203,11 @@ public sealed partial class {{name}}
     }
 
     {{~ for field in value_type.bean.hierarchy_export_fields ~}}
+{{~if field.comment != '' ~}}
     /// <summary>
     /// {{field.comment}}
     /// </summary>
+{{~end~}}
      public {{cs_define_type field.ctype}} {{field.cs_style_name}} => _data.{{field.cs_style_name}};
     {{~if field.ref~}}
         public {{field.cs_ref_type_name}} {{field.cs_ref_var_name}} => _data.{{field.cs_ref_var_name}};
@@ -243,9 +251,11 @@ namespace {{namespace}}
 public sealed partial class {{name}}
 {
     {{~for table in tables ~}}
+{{~if table.comment != '' ~}}
     /// <summary>
     /// {{table.comment}}
     /// </summary>
+{{~end~}}
     public {{table.full_name}} {{table.name}} {get; }
     {{~end~}}
 
diff --git a/src/Luban.Job.Cfg/Source/Generate/JavaCodeBinRender.cs b/src/Luban.Job.Cfg/Source/Generate/JavaCodeBinRender.cs
index 38d1f69..3fe6e58 100644
--- a/src/Luban.Job.Cfg/Source/Generate/JavaCodeBinRender.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/JavaCodeBinRender.cs
@@ -26,9 +26,11 @@ import bright.serialization.*;
     hierarchy_export_fields = x.hierarchy_export_fields
 }}
 
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 public {{x.java_class_modifier}} class {{name}} extends {{if parent_def_type}} {{x.parent_def_type.full_name_with_top_module}} {{else}} bright.serialization.AbstractBean {{end}}
 {
     public {{name}}(ByteBuf _buf)
@@ -79,9 +81,11 @@ public {{x.java_class_modifier}} class {{name}} extends {{if parent_def_type}} {
     }
 
     {{~ for field in export_fields ~}}
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
     public final {{java_define_type field.ctype}} {{field.java_style_name}};
     {{~if field.index_field~}} 
     public final java.util.HashMap<{{java_box_define_type field.index_field.ctype}}, {{java_box_define_type field.ctype.element_type}}> {{field.java_style_name}}_Index = new java.util.HashMap<>();
@@ -158,9 +162,11 @@ import bright.serialization.*;
     value_type =  x.value_ttype
 ~}}
 
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 public final class {{name}}
 {
     {{~if x.is_map_table ~}}
@@ -212,9 +218,11 @@ public final class {{name}}
 
 
     {{~ for field in value_type.bean.hierarchy_export_fields ~}}
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
      public {{java_define_type field.ctype}} {{field.java_getter_name}}() { return _data.{{field.java_style_name}}; }
     {{~end~}}
 
@@ -247,9 +255,11 @@ public final class {{name}}
     }
 
     {{~for table in tables ~}}
+{{~if table.comment != '' ~}}
     /**
      * {{table.comment}}
      */
+{{~end~}}
     public final {{table.full_name_with_top_module}} {{table.name}};
     {{~end~}}
 
diff --git a/src/Luban.Job.Cfg/Source/Generate/Python27CodeJsonRender.cs b/src/Luban.Job.Cfg/Source/Generate/Python27CodeJsonRender.cs
index 6f448f7..d1c1e6e 100644
--- a/src/Luban.Job.Cfg/Source/Generate/Python27CodeJsonRender.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/Python27CodeJsonRender.cs
@@ -23,9 +23,11 @@ namespace Luban.Job.Cfg.Generate
     hierarchy_export_fields = x.hierarchy_export_fields
 }}
 
+{{~if x.comment != '' ~}}
 '''
 {{x.comment}}
 '''
+{{~end~}}
 class {{name}} {{if parent_def_type}}({{parent_def_type.py_full_name}}){{end}}:
 {{~if x.is_abstract_type~}}
     _childrenTypes = None
@@ -78,9 +80,11 @@ class {{name}} {{if parent_def_type}}({{parent_def_type.py_full_name}}){{end}}:
     key_type2 =  x.key_ttype2
     value_type =  x.value_ttype
 }}
+{{~if x.comment != '' ~}}
 '''
 {{x.comment}}
 '''
+{{~end~}}
 class {{name}}:
     {{~if x.is_map_table ~}}
 
@@ -107,9 +111,11 @@ class {{name}}:
     def getData(self) : return self._data
 
     {{~ for field in value_type.bean.hierarchy_export_fields ~}}
+{{~if field.comment != '' ~}}
     '''
     {{field.comment}}
     '''
+{{~end~}}
     def {{field.py_style_name}}(self) : return self._data.{{field.py_style_name}}
     {{~end~}}
     {{~end~}}
diff --git a/src/Luban.Job.Cfg/Source/Generate/Python3CodeJsonRender.cs b/src/Luban.Job.Cfg/Source/Generate/Python3CodeJsonRender.cs
index efb9917..0b327cb 100644
--- a/src/Luban.Job.Cfg/Source/Generate/Python3CodeJsonRender.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/Python3CodeJsonRender.cs
@@ -101,9 +101,11 @@ class {{name}}:
     def getData(self) : return self._data
 
     {{~ for field in value_type.bean.hierarchy_export_fields ~}}
+{{~if field.comment != '' ~}}
     '''
     {{field.comment}}
     '''
+{{~end~}}
     def {{field.py_style_name}}(self) : return self._data.{{field.py_style_name}}
     {{~end~}}
     {{~end~}}
diff --git a/src/Luban.Job.Cfg/Source/Generate/PythonCodeRenderBase.cs b/src/Luban.Job.Cfg/Source/Generate/PythonCodeRenderBase.cs
index 372f572..1b32d0e 100644
--- a/src/Luban.Job.Cfg/Source/Generate/PythonCodeRenderBase.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/PythonCodeRenderBase.cs
@@ -21,14 +21,18 @@ namespace Luban.Job.Cfg.Generate
 
 
             var template = t_tsConstRender ??= Template.Parse(@"
+{{~if x.comment != '' ~}}
 '''
 {{x.comment}}
 '''
+{{~end~}}
 class {{x.py_full_name}}:
     {{~ for item in x.items ~}}
+{{~if item.comment != '' ~}}
     '''
     {{item.comment}}
     '''
+{{~end~}}
     {{item.name}} = {{py_const_value item.ctype item.value}}
     {{~end~}}
     {{~if (x.items == empty)~}}
@@ -46,14 +50,18 @@ class {{x.py_full_name}}:
         public override string Render(DefEnum e)
         {
             var template = t_tsEnumRender ??= Template.Parse(@"
+{{~if comment != '' ~}}
 '''
 {{comment}}
 '''
+{{~end~}}
 class {{py_full_name}}:
     {{~ for item in items ~}}
+{{~if item.comment != '' ~}}
     '''
     {{item.comment}}
     '''
+{{~end~}}
     {{item.name}} = {{item.value}}
     {{~end~}}
     {{~if (items == empty)~}}
diff --git a/src/Luban.Job.Cfg/Source/Generate/TypescriptCodeBinRender.cs b/src/Luban.Job.Cfg/Source/Generate/TypescriptCodeBinRender.cs
index 41905e7..b5f88d8 100644
--- a/src/Luban.Job.Cfg/Source/Generate/TypescriptCodeBinRender.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/TypescriptCodeBinRender.cs
@@ -23,9 +23,11 @@ namespace Luban.Job.Cfg.Generate
 }}
 
 {{x.typescript_namespace_begin}}
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 export {{if x.is_abstract_type}} abstract {{end}} class {{name}} {{if parent_def_type}} extends {{x.parent}}{{end}} {
 {{~if x.is_abstract_type~}}
     static constructorFrom(_buf_: ByteBuf): {{name}} {
@@ -48,9 +50,11 @@ export {{if x.is_abstract_type}} abstract {{end}} class {{name}} {{if parent_def
     }
 
     {{~ for field in export_fields ~}}
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
     readonly {{field.ts_style_name}}{{if field.is_nullable}}?{{end}}: {{ts_define_type field.ctype}}
     {{~if field.gen_ref~}}
     {{field.ts_ref_validator_define}}
@@ -91,9 +95,11 @@ export {{if x.is_abstract_type}} abstract {{end}} class {{name}} {{if parent_def
         value_type =  x.value_ttype
     }}
 {{x.typescript_namespace_begin}}
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 export class {{name}} {
     {{~if x.is_map_table ~}}
     private _dataMap: Map<{{ts_define_type key_type}}, {{ts_define_type value_type}}>
@@ -134,9 +140,11 @@ export class {{name}} {
     getData(): {{ts_define_type value_type}} { return this._data }
 
     {{~ for field in value_type.bean.hierarchy_export_fields ~}}
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
      get {{field.ts_style_name}}(): {{ts_define_type field.ctype}} { return this._data.{{field.ts_style_name}} }
     {{~end~}}
 
@@ -170,9 +178,11 @@ type ByteBufLoader = (file: string) => ByteBuf
 export class {{name}} {
     {{~ for table in tables ~}}
     private _{{table.name}}: {{table.full_name}}
+{{~if table.comment != '' ~}}
     /**
      * {{table.comment}}
      */
+{{~end~}}
     get {{table.name}}(): {{table.full_name}}  { return this._{{table.name}}}
     {{~end~}}
 
diff --git a/src/Luban.Job.Cfg/Source/Generate/TypescriptCodeJsonRender.cs b/src/Luban.Job.Cfg/Source/Generate/TypescriptCodeJsonRender.cs
index a26e6d8..02e6c02 100644
--- a/src/Luban.Job.Cfg/Source/Generate/TypescriptCodeJsonRender.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/TypescriptCodeJsonRender.cs
@@ -23,9 +23,11 @@ namespace Luban.Job.Cfg.Generate
 }}
 
 {{x.typescript_namespace_begin}}
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 export {{if x.is_abstract_type}} abstract {{end}} class {{name}} {{if parent_def_type}} extends {{x.parent}}{{end}} {
 {{~if x.is_abstract_type~}}
     static constructorFrom(_json_: any): {{name}} {
@@ -51,9 +53,11 @@ export {{if x.is_abstract_type}} abstract {{end}} class {{name}} {{if parent_def
     }
 
     {{~ for field in export_fields ~}}
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
     readonly {{field.ts_style_name}}{{if field.is_nullable}}?{{end}}: {{ts_define_type field.ctype}}
     {{~if field.gen_ref~}}
     {{field.ts_ref_validator_define}}
@@ -94,9 +98,11 @@ export {{if x.is_abstract_type}} abstract {{end}} class {{name}} {{if parent_def
         value_type =  x.value_ttype
     }}
 {{x.typescript_namespace_begin}}
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 export class {{name}}{
     {{~if x.is_map_table ~}}
     private _dataMap: Map<{{ts_define_type key_type}}, {{ts_define_type value_type}}>
@@ -134,9 +140,11 @@ export class {{name}}{
     getData(): {{ts_define_type value_type}} { return this._data; }
 
     {{~ for field in value_type.bean.hierarchy_export_fields ~}}
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
      get  {{field.ts_style_name}}(): {{ts_define_type field.ctype}} { return this._data.{{field.ts_style_name}}; }
     {{~end~}}
 
@@ -170,9 +178,11 @@ type JsonLoader = (file: string) => any
 export class {{name}} {
     {{~ for table in tables ~}}
     private _{{table.name}}: {{table.full_name}}
+{{~if table.comment != '' ~}}
     /**
      * {{table.comment}}
      */
+{{~end~}}
     get {{table.name}}(): {{table.full_name}}  { return this._{{table.name}};}
     {{~end~}}
 
diff --git a/src/Luban.Job.Common/Source/Utils/RenderUtil.cs b/src/Luban.Job.Common/Source/Utils/RenderUtil.cs
index 23ebe7b..6bbb935 100644
--- a/src/Luban.Job.Common/Source/Utils/RenderUtil.cs
+++ b/src/Luban.Job.Common/Source/Utils/RenderUtil.cs
@@ -21,15 +21,19 @@ namespace Luban.Job.Common.Utils
             var template = t_constRender ??= Template.Parse(@"
 namespace {{x.namespace_with_top_module}}
 {
+{{~if x.comment != '' ~}}
     /// <summary>
     /// {{x.comment}}
     /// </summary>
+{{~end~}}
     public sealed class {{x.name}}
     {
         {{~ for item in x.items ~}}
+{{~if item.comment != '' ~}}
         /// <summary>
         /// {{item.comment}}
         /// </summary>
+{{~end~}}
         public const {{cs_define_type item.ctype}} {{item.name}} = {{cs_const_value item.ctype item.value}};
         {{~end~}}
     }
@@ -48,18 +52,22 @@ namespace {{x.namespace_with_top_module}}
             var template = t_enumRender ??= Template.Parse(@"
 namespace {{namespace_with_top_module}}
 {
+{{~if comment != '' ~}}
     /// <summary>
     /// {{comment}}
     /// </summary>
+{{~end~}}
     {{~if is_flags~}}
     [System.Flags]
     {{~end~}}
     public enum {{name}}
     {
         {{~ for item in items ~}}
+{{~if item.comment != '' ~}}
         /// <summary>
         /// {{item.comment}}
         /// </summary>
+{{~end~}}
         {{item.name}} = {{item.value}},
         {{~end~}}
     }
@@ -87,15 +95,19 @@ namespace {{namespace_with_top_module}}
             var template = t_javaConstRender ??= Template.Parse(@"
 package {{x.namespace_with_top_module}};
 
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 public final class {{x.name}}
 {
     {{~ for item in x.items ~}}
+{{~if item.comment != '' ~}}
     /**
      * {{item.comment}}
      */
+{{~end~}}
     public static final {{java_define_type item.ctype}} {{item.name}} = {{java_const_value item.ctype item.value}};
     {{~end~}}
 }
@@ -113,15 +125,19 @@ public final class {{x.name}}
         {
             var template = t_javaEnumRender ??= Template.Parse(@"
 package {{namespace_with_top_module}};
+{{~if comment != '' ~}}
 /**
  * {{comment}}
  */
+{{~end~}}
 public enum {{name}}
 {
     {{~ for item in items ~}}
+{{~if item.comment != '' ~}}
     /**
      * {{item.comment}}
      */
+{{~end~}}
     {{item.name}}({{item.value}}),
     {{~end~}}
     ;
@@ -163,15 +179,19 @@ public enum {{name}}
 
             var template = t_cppConstRender ??= Template.Parse(@"
 {{x.cpp_namespace_begin}}
+{{~if comment != '' ~}}
 /**
-{{x.comment}}
-*/
+ * {{comment}}
+ */
+{{~end~}}
 struct {{x.name}}
 {
     {{~ for item in x.items ~}}
+{{~if item.comment != '' ~}}
     /**
-    {{item.comment}}
+     * {{item.comment}}
     */
+{{~end~}}
     static constexpr {{cpp_define_type item.ctype}} {{item.name}} = {{cpp_const_value item.ctype item.value}};
     {{~end~}}
 };
@@ -189,15 +209,19 @@ struct {{x.name}}
         {
             var template = t_cppEnumRender ??= Template.Parse(@"
 {{cpp_namespace_begin}}
+{{~if comment != '' ~}}
 /**
-{{comment}}
-*/
+ * {{comment}}
+ */
+{{~end~}}
 enum class {{name}}
 {
     {{~ for item in items ~}}
+{{~if item.comment != '' ~}}
     /**
-    {{item.comment}}
+     * {{item.comment}}
     */
+{{~end~}}
     {{item.name}} = {{item.value}},
     {{~end~}}
 };
@@ -223,14 +247,18 @@ enum class {{name}}
 
             var template = t_tsConstRender ??= Template.Parse(@"
 {{x.typescript_namespace_begin}}
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 export class {{x.name}} {
     {{~ for item in x.items ~}}
+{{~if item.comment != '' ~}}
     /**
      * {{item.comment}}
      */
+{{~end~}}
     static {{item.name}} = {{ts_const_value item.ctype item.value}};
     {{~end~}}
 }
@@ -248,14 +276,18 @@ export class {{x.name}} {
         {
             var template = t_tsEnumRender ??= Template.Parse(@"
 {{typescript_namespace_begin}}
+{{~if comment != '' ~}}
 /**
  * {{comment}}
  */
+{{~end~}}
 export enum {{name}} {
     {{~for item in items ~}}
+{{~if item.comment != '' ~}}
     /**
      * {{item.comment}}
      */
+{{~end~}}
     {{item.name}} = {{item.value}},
     {{~end~}}
 }
diff --git a/src/Luban.Job.Db/Source/Generate/AsyncCsRender.cs b/src/Luban.Job.Db/Source/Generate/AsyncCsRender.cs
index 99016d6..3fb7c64 100644
--- a/src/Luban.Job.Db/Source/Generate/AsyncCsRender.cs
+++ b/src/Luban.Job.Db/Source/Generate/AsyncCsRender.cs
@@ -50,9 +50,11 @@ using Bright.Serialization;
 namespace {{x.namespace_with_top_module}}
 {
 
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public interface {{readonly_name}} {{if parent_def_type}}: IReadOnly{{x.parent_def_type.name}} {{end}}
 {
     {{~ for field in fields~}}
@@ -60,9 +62,11 @@ public interface {{readonly_name}} {{if parent_def_type}}: IReadOnly{{x.parent_d
     {{~end~}}
 }
 
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public {{x.cs_class_modifier}} class {{name}} : {{if parent_def_type}} {{x.parent}} {{else}} Bright.Transaction.TxnBeanBase {{end}}, {{readonly_name}}
 {
     {{~ for field in fields~}}
@@ -97,9 +101,11 @@ public {{x.cs_class_modifier}} class {{name}} : {{if parent_def_type}} {{x.paren
         }
     }
 
+{{~if field.comment != '' ~}}
     /// <summary>
     /// {{field.comment}}
     /// </summary>
+{{~end~}}
     public {{db_cs_define_type ctype}} {{field.cs_style_name}}
     { 
         get
@@ -136,21 +142,27 @@ public {{x.cs_class_modifier}} class {{name}} : {{if parent_def_type}} {{x.paren
         }
     }
         {{~else~}}
+{{~if field.comment != '' ~}}
         /// <summary>
         /// {{field.comment}}
         /// </summary>
+{{~end~}}
          public {{db_cs_define_type ctype}} {{field.cs_style_name}} => {{field.internal_name}};
         {{~end~}}
 
         {{~if ctype.bean || ctype.element_type ~}}
+{{~if field.comment != '' ~}}
         /// <summary>
         /// {{field.comment}}
         /// </summary>
+{{~end~}}
         {{db_cs_readonly_define_type ctype}} {{readonly_name}}.{{field.cs_style_name}} => {{field.internal_name}};
         {{~else if ctype.is_map~}}
+{{~if field.comment != '' ~}}
         /// <summary>
         /// {{field.comment}}
         /// </summary>
+{{~end~}}
         {{db_cs_readonly_define_type ctype}} {{readonly_name}}.{{field.cs_style_name}} => new Bright.Transaction.Collections.PReadOnlyMap<{{db_cs_readonly_define_type ctype.key_type}}, {{db_cs_readonly_define_type ctype.value_type}}, {{db_cs_define_type ctype.value_type}}>({{field.internal_name}});
         {{~end~}}
     {{~end~}}
@@ -249,9 +261,11 @@ using System.Threading.Tasks;
 namespace {{x.namespace_with_top_module}}
 {
 
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public sealed class {{name}}
 {
     public static {{base_table_type}} Table { get; } = new {{internal_table_type}}();
diff --git a/src/Luban.Job.Db/Source/Generate/SyncCsRender.cs b/src/Luban.Job.Db/Source/Generate/SyncCsRender.cs
index 686782e..8984e8d 100644
--- a/src/Luban.Job.Db/Source/Generate/SyncCsRender.cs
+++ b/src/Luban.Job.Db/Source/Generate/SyncCsRender.cs
@@ -50,9 +50,11 @@ using Bright.Serialization;
 namespace {{x.namespace_with_top_module}}
 {
 
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public interface {{readonly_name}} {{if parent_def_type}}: IReadOnly{{x.parent_def_type.name}} {{end}}
 {
     {{~ for field in fields~}}
@@ -60,9 +62,11 @@ public interface {{readonly_name}} {{if parent_def_type}}: IReadOnly{{x.parent_d
     {{~end~}}
 }
 
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public {{x.cs_class_modifier}} class {{name}} : {{if parent_def_type}} {{x.parent}} {{else}} Bright.Transaction.TxnBeanBase {{end}}, {{readonly_name}}
 {
     {{~ for field in fields~}}
@@ -97,9 +101,11 @@ public {{x.cs_class_modifier}} class {{name}} : {{if parent_def_type}} {{x.paren
         }
     }
 
+{{~if field.comment != '' ~}}
     /// <summary>
     /// {{field.comment}}
     /// </summary>
+{{~end~}}
     public {{db_cs_define_type ctype}} {{field.cs_style_name}}
     { 
         get
@@ -136,21 +142,27 @@ public {{x.cs_class_modifier}} class {{name}} : {{if parent_def_type}} {{x.paren
         }
     }
         {{~else~}}
+{{~if field.comment != '' ~}}
         /// <summary>
         /// {{field.comment}}
         /// </summary>
+{{~end~}}
          public {{db_cs_define_type ctype}} {{field.cs_style_name}} => {{field.internal_name}};
         {{~end~}}
 
         {{~if ctype.bean || ctype.element_type ~}}
+{{~if field.comment != '' ~}}
         /// <summary>
         /// {{field.comment}}
         /// </summary>
+{{~end~}}
         {{db_cs_readonly_define_type ctype}} {{readonly_name}}.{{field.cs_style_name}} => {{field.internal_name}};
         {{~else if ctype.is_map~}}
+{{~if field.comment != '' ~}}
         /// <summary>
         /// {{field.comment}}
         /// </summary>
+{{~end~}}
         {{db_cs_readonly_define_type ctype}} {{readonly_name}}.{{field.cs_style_name}} => new Bright.Transaction.Collections.PReadOnlyMap<{{db_cs_readonly_define_type ctype.key_type}}, {{db_cs_readonly_define_type ctype.value_type}}, {{db_cs_define_type ctype.value_type}}>({{field.internal_name}});
         {{~end~}}
     {{~end~}}
@@ -249,9 +261,11 @@ using System.Threading.Tasks;
 namespace {{x.namespace_with_top_module}}
 {
 
+{{~if x.comment != '' ~}}
 /// <summary>
 /// {{x.comment}}
 /// </summary>
+{{~end~}}
 public sealed class {{name}}
 {
     public static {{base_table_type}} Table { get; } = new {{internal_table_type}}();
diff --git a/src/Luban.Job.Db/Source/Generate/TypescriptRender.cs b/src/Luban.Job.Db/Source/Generate/TypescriptRender.cs
index 9c9c246..7e97a83 100644
--- a/src/Luban.Job.Db/Source/Generate/TypescriptRender.cs
+++ b/src/Luban.Job.Db/Source/Generate/TypescriptRender.cs
@@ -49,14 +49,18 @@ namespace Luban.Job.Db.Generate
 }}
 
 {{x.typescript_namespace_begin}}
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 export {{x.ts_class_modifier}} class {{name}} extends {{if parent_def_type}} {{x.parent}} {{else}} TxnBeanBase {{end}}{
     {{~ for field in fields~}}
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
     {{if is_abstract_type}}protected{{else}}private{{end}} {{field.internal_name}}: {{db_ts_define_type field.ctype}} 
     {{~end}}
 
@@ -84,9 +88,11 @@ export {{x.ts_class_modifier}} class {{name}} extends {{if parent_def_type}} {{x
         }
     }
 
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
     get {{field.ts_style_name}}(): {{db_ts_define_type ctype}} {
         if (this.isManaged) {
             var txn = TransactionContext.current
@@ -98,9 +104,11 @@ export {{x.ts_class_modifier}} class {{name}} extends {{if parent_def_type}} {{x
         }
     }
 
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
     set {{field.ts_style_name}}(value: {{db_ts_define_type ctype}}) {
         {{~if db_field_cannot_null~}}
         if (value == null) throw new Error()
@@ -117,9 +125,11 @@ export {{x.ts_class_modifier}} class {{name}} extends {{if parent_def_type}} {{x
     }
 
         {{~else~}}
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
     get {{field.ts_style_name}}(): {{db_ts_define_type ctype}}  { return {{field.internal_name_with_this}} }
         {{~end~}}
     {{~end~}}
@@ -231,9 +241,11 @@ export {{x.ts_class_modifier}} class {{name}} extends {{if parent_def_type}} {{x
     }
 }
 
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 export class {{name}} {
     static readonly _table = new {{internal_table_type}}();
     static get table(): TxnTableGeneric<{{db_ts_define_type key_ttype}},{{db_ts_define_type value_ttype}}> { return this._table }
diff --git a/src/Luban.Job.Proto/Source/Generate/CsRender.cs b/src/Luban.Job.Proto/Source/Generate/CsRender.cs
index 0e034c2..3a1477f 100644
--- a/src/Luban.Job.Proto/Source/Generate/CsRender.cs
+++ b/src/Luban.Job.Proto/Source/Generate/CsRender.cs
@@ -53,9 +53,11 @@ using Bright.Serialization;
 namespace {{x.namespace_with_top_module}}
 {
 
+{{~if x.comment != '' ~}}
     /// <summary>
     /// {{x.comment}}
     /// </summary>
+{{~end~}}
     public  {{if is_value_type}}struct{{else}}{{x.cs_class_modifier}} class{{end}} {{name}} : {{if parent_def_type}} {{parent}} {{else}} Bright.Serialization.BeanBase {{end}}
     {
         {{~if !is_value_type~}}
@@ -113,9 +115,11 @@ namespace {{x.namespace_with_top_module}}
         }
 
         {{~ for field in fields ~}}
+{{~if field.comment != '' ~}}
         /// <summary>
         /// {{field.comment}}
         /// </summary>
+{{~end~}}
          public {{cs_define_type field.ctype}} {{field.cs_style_name}};
 
         {{~end~}}
@@ -172,15 +176,19 @@ using Bright.Serialization;
 
 namespace {{x.namespace_with_top_module}}
 {
+{{~if x.comment != '' ~}}
     /// <summary>
     /// {{x.comment}}
     /// </summary>
+{{~end~}}
     public sealed class {{name}} : Bright.Net.Codecs.Protocol
     {
         {{~ for field in fields ~}}
+{{~if field.comment != '' ~}}
         /// <summary>
         /// {{field.comment}}
         /// </summary>
+{{~end~}}
          public {{cs_define_type field.ctype}} {{field.cs_style_name}};
 
         {{~end~}}
@@ -264,9 +272,11 @@ using Bright.Serialization;
 namespace {{x.namespace_with_top_module}}
 {
    
+{{~if x.comment != '' ~}}
     /// <summary>
     /// {{x.comment}}
     /// </summary>
+{{~end~}}
     public sealed class {{name}} : Bright.Net.Codecs.Rpc<{{cs_define_type targ_type}}, {{cs_define_type tres_type}}>
     {
         public {{name}}()
diff --git a/src/Luban.Job.Proto/Source/Generate/TypescriptRender.cs b/src/Luban.Job.Proto/Source/Generate/TypescriptRender.cs
index 9e63315..32c551d 100644
--- a/src/Luban.Job.Proto/Source/Generate/TypescriptRender.cs
+++ b/src/Luban.Job.Proto/Source/Generate/TypescriptRender.cs
@@ -55,9 +55,11 @@ namespace Luban.Job.Proto.Generate
 
 {{x.typescript_namespace_begin}}
 
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 export {{if x.is_abstract_type}} abstract {{end}} class {{name}} extends {{if parent_def_type}}{{x.parent}}{{else}}BeanBase{{end}} {
 {{~if x.is_abstract_type~}}
     static serializeTo(_buf_ : ByteBuf, _bean_ : {{name}}) {
@@ -84,9 +86,11 @@ export {{if x.is_abstract_type}} abstract {{end}} class {{name}} extends {{if pa
 
 
     {{~ for field in fields ~}}
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
      {{field.ts_style_name}}{{if field.is_nullable}}?{{end}} : {{ts_define_type field.ctype}}
     {{~end~}}
 
@@ -144,18 +148,22 @@ export {{if x.is_abstract_type}} abstract {{end}} class {{name}} extends {{if pa
 }}
 {{x.typescript_namespace_begin}}
 
+{{~if x.comment != '' ~}}
 /**
  * {{x.comment}}
  */
+{{~end~}}
 export class {{name}} extends Protocol {
     static readonly ID = {{x.id}}
     getTypeId() { return {{name}}.ID }
 
 
     {{~ for field in fields ~}}
+{{~if field.comment != '' ~}}
     /**
      * {{field.comment}}
      */
+{{~end~}}
      {{field.ts_style_name}}{{if field.is_nullable}}?{{end}} : {{ts_define_type field.ctype}}
     {{~end~}}