diff --git a/fluentgen/src/main/java/com/azure/autorest/fluent/mapper/FluentMapper.java b/fluentgen/src/main/java/com/azure/autorest/fluent/mapper/FluentMapper.java
index 1e1d89facd..3f227e0d01 100644
--- a/fluentgen/src/main/java/com/azure/autorest/fluent/mapper/FluentMapper.java
+++ b/fluentgen/src/main/java/com/azure/autorest/fluent/mapper/FluentMapper.java
@@ -26,6 +26,7 @@
 import com.azure.autorest.fluent.util.Utils;
 import com.azure.autorest.mapper.Mappers;
 import com.azure.autorest.model.clientmodel.Client;
+import com.azure.autorest.model.clientmodel.ClientModels;
 import com.azure.autorest.model.clientmodel.ModuleInfo;
 import org.slf4j.Logger;
 
@@ -123,7 +124,10 @@ public FluentClient map(CodeModel codeModel, Client client) {
     FluentClient basicMap(CodeModel codeModel, Client client) {
         FluentClient fluentClient = new FluentClient(client);
 
-        fluentClient.setModuleInfo(moduleInfo());
+        final String implementationModelsPackage = JavaSettings.getInstance().getImplementationSubpackage() + "." + JavaSettings.getInstance().getModelsSubpackage();
+        final boolean hasImplementationModels = ClientModels.getInstance().getModels().stream()
+                        .anyMatch(m -> m.getPackage().endsWith(implementationModelsPackage));
+        fluentClient.setModuleInfo(getModuleInfo(hasImplementationModels));
 
         FluentStatic.setFluentClient(fluentClient);
 
@@ -153,7 +157,7 @@ FluentClient basicMap(CodeModel codeModel, Client client) {
         return fluentClient;
     }
 
-    private static ModuleInfo moduleInfo() {
+    private static ModuleInfo getModuleInfo(boolean hasImplementationModels) {
         JavaSettings settings = JavaSettings.getInstance();
         ModuleInfo moduleInfo = new ModuleInfo(settings.getPackage());
 
@@ -170,6 +174,9 @@ private static ModuleInfo moduleInfo() {
         List<ModuleInfo.OpenModule> openModules = moduleInfo.getOpenModules();
         openModules.add(new ModuleInfo.OpenModule(settings.getPackage(settings.getFluentModelsSubpackage()), openToModules));
         openModules.add(new ModuleInfo.OpenModule(settings.getPackage(settings.getModelsSubpackage()), openToModules));
+        if (hasImplementationModels) {
+            openModules.add(new ModuleInfo.OpenModule(settings.getPackage(settings.getImplementationSubpackage(), settings.getModelsSubpackage()), openToModules));
+        }
 
         return moduleInfo;
     }
diff --git a/javagen/src/main/java/com/azure/autorest/mapper/ObjectMapper.java b/javagen/src/main/java/com/azure/autorest/mapper/ObjectMapper.java
index c53cf923e3..943a39eea0 100644
--- a/javagen/src/main/java/com/azure/autorest/mapper/ObjectMapper.java
+++ b/javagen/src/main/java/com/azure/autorest/mapper/ObjectMapper.java
@@ -55,11 +55,15 @@ private ClassType createClassType(ObjectSchema compositeType) {
         } else if (settings.isFluent() && compositeType.isFlattenedSchema()) {
             // put class of flattened type to implementation package
             classPackage = settings.getPackage(settings.getFluentModelsSubpackage());
-        } else if (settings.isDataPlaneClient() && (isPageModel(compositeType) || isInternalModel(compositeType))) {
+        } else if (settings.isDataPlaneClient() && isInternalModel(compositeType)) {
+            // internal type is not exposed to user
+            classPackage = settings.getPackage(settings.getImplementationSubpackage(), settings.getModelsSubpackage());
+        } else if (isPageModel(compositeType)) {
             // put class of Page<> type to implementation package
-            // For TypeSpec, these are not generated to class
+            // for DPG from TypeSpec, these are not generated to class
+
+            // this would not affect mgmt from Swagger, as the "usage" from m4 does not have this information.
 
-            // same for internal type, which is not exposed to user
             classPackage = settings.getPackage(settings.getImplementationSubpackage(), settings.getModelsSubpackage());
         } else {
             classPackage = settings.getPackage(settings.getModelsSubpackage());
diff --git a/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/ChildResourcesInterfacesClientImpl.java b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/ChildResourcesInterfacesClientImpl.java
index 653144cad1..89893f5975 100644
--- a/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/ChildResourcesInterfacesClientImpl.java
+++ b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/ChildResourcesInterfacesClientImpl.java
@@ -35,7 +35,7 @@
 import com.azure.core.util.polling.SyncPoller;
 import com.cadl.armresourceprovider.fluent.ChildResourcesInterfacesClient;
 import com.cadl.armresourceprovider.fluent.models.ChildResourceInner;
-import com.cadl.armresourceprovider.models.ChildResourceListResult;
+import com.cadl.armresourceprovider.implementation.models.ChildResourceListResult;
 import com.cadl.armresourceprovider.models.ChildResourceUpdate;
 import java.nio.ByteBuffer;
 import reactor.core.publisher.Flux;
diff --git a/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/OperationsClientImpl.java b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/OperationsClientImpl.java
index 12d43bc83f..20cb8374f6 100644
--- a/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/OperationsClientImpl.java
+++ b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/OperationsClientImpl.java
@@ -27,7 +27,7 @@
 import com.azure.core.util.FluxUtil;
 import com.cadl.armresourceprovider.fluent.OperationsClient;
 import com.cadl.armresourceprovider.fluent.models.OperationInner;
-import com.cadl.armresourceprovider.models.PagedOperation;
+import com.cadl.armresourceprovider.implementation.models.PagedOperation;
 import reactor.core.publisher.Mono;
 
 /**
diff --git a/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/TopLevelArmResourceInterfacesClientImpl.java b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/TopLevelArmResourceInterfacesClientImpl.java
index 9e74504679..80fb111599 100644
--- a/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/TopLevelArmResourceInterfacesClientImpl.java
+++ b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/TopLevelArmResourceInterfacesClientImpl.java
@@ -34,7 +34,7 @@
 import com.azure.core.util.polling.SyncPoller;
 import com.cadl.armresourceprovider.fluent.TopLevelArmResourceInterfacesClient;
 import com.cadl.armresourceprovider.fluent.models.TopLevelArmResourceInner;
-import com.cadl.armresourceprovider.models.TopLevelArmResourceListResult;
+import com.cadl.armresourceprovider.implementation.models.TopLevelArmResourceListResult;
 import com.cadl.armresourceprovider.models.TopLevelArmResourceUpdate;
 import java.nio.ByteBuffer;
 import reactor.core.publisher.Flux;
diff --git a/typespec-tests/src/main/java/com/cadl/armresourceprovider/models/ChildResourceListResult.java b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/models/ChildResourceListResult.java
similarity index 97%
rename from typespec-tests/src/main/java/com/cadl/armresourceprovider/models/ChildResourceListResult.java
rename to typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/models/ChildResourceListResult.java
index 41c366b2e2..32b207be3b 100644
--- a/typespec-tests/src/main/java/com/cadl/armresourceprovider/models/ChildResourceListResult.java
+++ b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/models/ChildResourceListResult.java
@@ -2,7 +2,7 @@
 // Licensed under the MIT License.
 // Code generated by Microsoft (R) TypeSpec Code Generator.
 
-package com.cadl.armresourceprovider.models;
+package com.cadl.armresourceprovider.implementation.models;
 
 import com.azure.core.annotation.Fluent;
 import com.azure.core.util.logging.ClientLogger;
diff --git a/typespec-tests/src/main/java/com/cadl/armresourceprovider/models/PagedOperation.java b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/models/PagedOperation.java
similarity index 97%
rename from typespec-tests/src/main/java/com/cadl/armresourceprovider/models/PagedOperation.java
rename to typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/models/PagedOperation.java
index ef27dc1180..74f0cb5643 100644
--- a/typespec-tests/src/main/java/com/cadl/armresourceprovider/models/PagedOperation.java
+++ b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/models/PagedOperation.java
@@ -2,7 +2,7 @@
 // Licensed under the MIT License.
 // Code generated by Microsoft (R) TypeSpec Code Generator.
 
-package com.cadl.armresourceprovider.models;
+package com.cadl.armresourceprovider.implementation.models;
 
 import com.azure.core.annotation.Fluent;
 import com.azure.core.util.logging.ClientLogger;
diff --git a/typespec-tests/src/main/java/com/cadl/armresourceprovider/models/TopLevelArmResourceListResult.java b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/models/TopLevelArmResourceListResult.java
similarity index 97%
rename from typespec-tests/src/main/java/com/cadl/armresourceprovider/models/TopLevelArmResourceListResult.java
rename to typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/models/TopLevelArmResourceListResult.java
index 984b94e217..20dfd2402d 100644
--- a/typespec-tests/src/main/java/com/cadl/armresourceprovider/models/TopLevelArmResourceListResult.java
+++ b/typespec-tests/src/main/java/com/cadl/armresourceprovider/implementation/models/TopLevelArmResourceListResult.java
@@ -2,7 +2,7 @@
 // Licensed under the MIT License.
 // Code generated by Microsoft (R) TypeSpec Code Generator.
 
-package com.cadl.armresourceprovider.models;
+package com.cadl.armresourceprovider.implementation.models;
 
 import com.azure.core.annotation.Fluent;
 import com.azure.core.util.logging.ClientLogger;
diff --git a/typespec-tests/src/main/resources/META-INF/native-image/com.azure.resourcemanager/azure-resourcemanager-armresourceprovider-generated/reflect-config.json b/typespec-tests/src/main/resources/META-INF/native-image/com.azure.resourcemanager/azure-resourcemanager-armresourceprovider-generated/reflect-config.json
index 0a16be2b89..b0255c524d 100644
--- a/typespec-tests/src/main/resources/META-INF/native-image/com.azure.resourcemanager/azure-resourcemanager-armresourceprovider-generated/reflect-config.json
+++ b/typespec-tests/src/main/resources/META-INF/native-image/com.azure.resourcemanager/azure-resourcemanager-armresourceprovider-generated/reflect-config.json
@@ -14,7 +14,7 @@
   "allDeclaredFields" : true,
   "allDeclaredMethods" : true
 }, {
-  "name" : "com.cadl.armresourceprovider.models.ChildResourceListResult",
+  "name" : "com.cadl.armresourceprovider.implementation.models.ChildResourceListResult",
   "allDeclaredConstructors" : true,
   "allDeclaredFields" : true,
   "allDeclaredMethods" : true
@@ -39,7 +39,7 @@
   "allDeclaredFields" : true,
   "allDeclaredMethods" : true
 }, {
-  "name" : "com.cadl.armresourceprovider.models.TopLevelArmResourceListResult",
+  "name" : "com.cadl.armresourceprovider.implementation.models.TopLevelArmResourceListResult",
   "allDeclaredConstructors" : true,
   "allDeclaredFields" : true,
   "allDeclaredMethods" : true
@@ -69,7 +69,7 @@
   "allDeclaredFields" : true,
   "allDeclaredMethods" : true
 }, {
-  "name" : "com.cadl.armresourceprovider.models.PagedOperation",
+  "name" : "com.cadl.armresourceprovider.implementation.models.PagedOperation",
   "allDeclaredConstructors" : true,
   "allDeclaredFields" : true,
   "allDeclaredMethods" : true