diff --git a/Assets/YooAsset/Samples~/Extension Sample/Runtime/CopyBuildinManifestOperation.cs b/Assets/YooAsset/Samples~/Extension Sample/Runtime/CopyBuildinManifestOperation.cs
new file mode 100644
index 0000000..ee325ad
--- /dev/null
+++ b/Assets/YooAsset/Samples~/Extension Sample/Runtime/CopyBuildinManifestOperation.cs	
@@ -0,0 +1,159 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Security.Policy;
+using UnityEngine;
+using YooAsset;
+
+/// <summary>
+/// 拷贝内置清单文件到沙盒目录
+/// </summary>
+public class CopyBuildinManifestOperation : GameAsyncOperation
+{
+    private enum ESteps
+    {
+        None,
+        CheckHashFile,
+        UnpackHashFile,
+        CheckManifestFile,
+        UnpackManifestFile,
+        Done,
+    }
+
+    private readonly string _packageName;
+    private readonly string _packageVersion;
+    private ESteps _steps = ESteps.None;
+    private UnityWebFileRequestOperation _hashFileRequestOp;
+    private UnityWebFileRequestOperation _manifestFileRequestOp;
+
+    public CopyBuildinManifestOperation(string packageName, string packageVersion)
+    {
+        _packageName = packageName;
+        _packageVersion = packageVersion;
+    }
+    protected override void OnStart()
+    {
+        _steps = ESteps.CheckHashFile;
+    }
+    protected override void OnUpdate()
+    {
+        if (_steps == ESteps.None || _steps == ESteps.Done)
+            return;
+
+        if (_steps == ESteps.CheckHashFile)
+        {
+            string hashFilePath = GetCacheHashFilePath();
+            if (File.Exists(hashFilePath))
+            {
+                _steps = ESteps.CheckManifestFile;
+                return;
+            }
+
+            _steps = ESteps.UnpackHashFile;
+        }
+
+        if (_steps == ESteps.UnpackHashFile)
+        {
+            if(_hashFileRequestOp == null)
+            {
+                string sourcePath = GetBuildinHashFilePath();
+                string destPath = GetCacheHashFilePath();
+                string url = DownloadSystemHelper.ConvertToWWWPath(sourcePath);
+                _hashFileRequestOp = new UnityWebFileRequestOperation(url, destPath);
+                OperationSystem.StartOperation(_packageName, _hashFileRequestOp);
+            }
+
+            if (_hashFileRequestOp.IsDone == false)
+                return;
+
+            if (_hashFileRequestOp.Status == EOperationStatus.Succeed)
+            {
+                _steps = ESteps.CheckManifestFile;
+            }
+            else
+            {
+                _steps = ESteps.Done;
+                Status = EOperationStatus.Failed;
+                Error = _hashFileRequestOp.Error;
+            }
+        }
+
+        if (_steps == ESteps.CheckManifestFile)
+        {
+            string manifestFilePath = GetCacheManifestFilePath();
+            if (File.Exists(manifestFilePath))
+            {
+                _steps = ESteps.Done;
+                Status = EOperationStatus.Succeed;
+                return;
+            }
+
+            _steps = ESteps.UnpackManifestFile;
+        }
+
+        if (_steps == ESteps.UnpackManifestFile)
+        {
+            if (_manifestFileRequestOp == null)
+            {
+                string sourcePath = GetBuildinManifestFilePath();
+                string destPath = GetCacheManifestFilePath();
+                string url = DownloadSystemHelper.ConvertToWWWPath(sourcePath);
+                _manifestFileRequestOp = new UnityWebFileRequestOperation(url, destPath);
+                OperationSystem.StartOperation(_packageName, _manifestFileRequestOp);
+            }
+
+            if (_manifestFileRequestOp.IsDone == false)
+                return;
+
+            if (_manifestFileRequestOp.Status == EOperationStatus.Succeed)
+            {
+                _steps = ESteps.Done;
+                Status = EOperationStatus.Succeed;
+            }
+            else
+            {
+                _steps = ESteps.Done;
+                Status = EOperationStatus.Failed;
+                Error = _manifestFileRequestOp.Error;
+            }
+        }
+    }
+    protected override void OnAbort()
+    {
+    }
+
+    private string GetBuildinYooRoot()
+    {
+        return PathUtility.Combine(Application.streamingAssetsPath, YooAssetSettingsData.Setting.DefaultYooFolderName);
+    }
+    private string GetBuildinHashFilePath()
+    {
+        string fileRoot = GetBuildinYooRoot();
+        string fileName = YooAssetSettingsData.GetPackageHashFileName(_packageName, _packageVersion);
+        return PathUtility.Combine(fileRoot, fileName);
+    }
+    private string GetBuildinManifestFilePath()
+    {
+        string fileRoot = GetBuildinYooRoot();
+        string fileName = YooAssetSettingsData.GetManifestBinaryFileName(_packageName, _packageVersion);
+        return PathUtility.Combine(fileRoot, fileName);
+    }
+
+    private string GetCacheYooRoot()
+    {
+        return PathUtility.Combine(UnityEngine.Application.persistentDataPath, YooAssetSettingsData.Setting.DefaultYooFolderName);
+    }
+    private string GetCacheHashFilePath()
+    {
+        string fileRoot = GetCacheYooRoot();
+        string fileName = YooAssetSettingsData.GetPackageHashFileName(_packageName, _packageVersion);
+        return PathUtility.Combine(fileRoot, fileName);
+    }
+    private string GetCacheManifestFilePath()
+    {
+        string fileRoot = GetCacheYooRoot();
+        string fileName = YooAssetSettingsData.GetManifestBinaryFileName(_packageName, _packageVersion);
+        return PathUtility.Combine(fileRoot, fileName);
+    }
+}
\ No newline at end of file
diff --git a/Assets/YooAsset/Samples~/Extension Sample/Runtime/CopyBuildinManifestOperation.cs.meta b/Assets/YooAsset/Samples~/Extension Sample/Runtime/CopyBuildinManifestOperation.cs.meta
new file mode 100644
index 0000000..745ac22
--- /dev/null
+++ b/Assets/YooAsset/Samples~/Extension Sample/Runtime/CopyBuildinManifestOperation.cs.meta	
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 41ab464f315df234fb40b0c24e97ee23
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: