diff --git a/framework/src/Volo.Abp.Core/Volo/Abp/Reflection/ReflectionHelper.cs b/framework/src/Volo.Abp.Core/Volo/Abp/Reflection/ReflectionHelper.cs
index ab26313736..8c2142c37f 100644
--- a/framework/src/Volo.Abp.Core/Volo/Abp/Reflection/ReflectionHelper.cs
+++ b/framework/src/Volo.Abp.Core/Volo/Abp/Reflection/ReflectionHelper.cs
@@ -8,6 +8,26 @@ namespace Volo.Abp.Reflection;
 //TODO: Consider to make internal
 public static class ReflectionHelper
 {
+    /// <summary>
+    /// Checks whether the property is nullable, including nullable reference types (NRT).
+    /// </summary>
+    /// <param name="propertyInfo">Property info to check</param>
+    public static bool IsNullable(PropertyInfo propertyInfo)
+    {
+        if (propertyInfo.PropertyType.IsValueType)
+        {
+            return false;
+        }
+
+#if NET6_0_OR_GREATER
+        var nullabilityInfoContext = new System.Reflection.NullabilityInfoContext();
+        var nullabilityInfo = nullabilityInfoContext.Create(propertyInfo);
+        return nullabilityInfo.ReadState == System.Reflection.NullabilityState.Nullable;
+#else
+        return false;
+#endif
+    }
+
     //TODO: Ehhance summary
     /// <summary>
     /// Checks whether <paramref name="givenType"/> implements/inherits <paramref name="genericType"/>.
diff --git a/framework/src/Volo.Abp.Http/Volo/Abp/Http/Modeling/PropertyApiDescriptionModel.cs b/framework/src/Volo.Abp.Http/Volo/Abp/Http/Modeling/PropertyApiDescriptionModel.cs
index 55891d8cd6..cc2dcde767 100644
--- a/framework/src/Volo.Abp.Http/Volo/Abp/Http/Modeling/PropertyApiDescriptionModel.cs
+++ b/framework/src/Volo.Abp.Http/Volo/Abp/Http/Modeling/PropertyApiDescriptionModel.cs
@@ -29,6 +29,8 @@ public class PropertyApiDescriptionModel
 
     public string? Regex { get; set; }
 
+    public bool IsNullable { get; set; }
+
     public static PropertyApiDescriptionModel Create(PropertyInfo propertyInfo)
     {
         var customAttributes = propertyInfo.GetCustomAttributes(true);
@@ -39,6 +41,7 @@ public class PropertyApiDescriptionModel
             Type = ApiTypeNameHelper.GetTypeName(propertyInfo.PropertyType),
             TypeSimple = ApiTypeNameHelper.GetSimpleTypeName(propertyInfo.PropertyType),
             IsRequired = customAttributes.OfType<RequiredAttribute>().Any() || propertyInfo.GetCustomAttributesData().Any(attr => attr.AttributeType.Name == "RequiredMemberAttribute"),
+            IsNullable = Volo.Abp.Reflection.ReflectionHelper.IsNullable(propertyInfo),
             Minimum = customAttributes.OfType<RangeAttribute>().Select(x => x.Minimum).FirstOrDefault()?.ToString(),
             Maximum = customAttributes.OfType<RangeAttribute>().Select(x => x.Maximum).FirstOrDefault()?.ToString(),
             MinLength = customAttributes.OfType<MinLengthAttribute>().FirstOrDefault()?.Length ?? customAttributes.OfType<StringLengthAttribute>().FirstOrDefault()?.MinimumLength,
diff --git a/npm/ng-packs/packages/schematics/src/models/api-definition.ts b/npm/ng-packs/packages/schematics/src/models/api-definition.ts
index 513201f0a9..70dca68dd5 100644
--- a/npm/ng-packs/packages/schematics/src/models/api-definition.ts
+++ b/npm/ng-packs/packages/schematics/src/models/api-definition.ts
@@ -20,6 +20,7 @@ export interface PropertyDef {
   type: string;
   typeSimple: string;
   isRequired: boolean;
+  isNullable: boolean;
 }
 
 export interface Module {
diff --git a/npm/ng-packs/packages/schematics/src/utils/model.ts b/npm/ng-packs/packages/schematics/src/utils/model.ts
index 1ea9130ef2..40dacbdfa4 100644
--- a/npm/ng-packs/packages/schematics/src/utils/model.ts
+++ b/npm/ng-packs/packages/schematics/src/utils/model.ts
@@ -187,6 +187,7 @@ export function createRefToImportReducerCreator(params: ModelGeneratorParams) {
 
 function isOptionalProperty(prop: PropertyDef) {
   return (
+    prop.isNullable ||
     prop.typeSimple.endsWith('?') ||
     ((prop.typeSimple === 'string' || prop.typeSimple.includes('enum')) && !prop.isRequired)
   );