diff --git a/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/WechatFileSystem.cs b/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/WechatFileSystem.cs
new file mode 100644
index 00000000..bb1c2bca
--- /dev/null
+++ b/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/WechatFileSystem.cs	
@@ -0,0 +1,135 @@
+#if UNITY_WECHAT_GAME
+using UnityEngine;
+using UnityEngine.Networking;
+using YooAsset;
+using WeChatWASM;
+
+/// <summary>
+/// 微信小游戏文件系统扩展
+/// 参考：https://wechat-miniprogram.github.io/minigame-unity-webgl-transform/Design/UsingAssetBundle.html
+/// </summary>
+internal class WechatFileSystem : DefaultWebFileSystem
+{
+    /// <summary>
+    /// 资源文件加载
+    /// </summary>
+    public override FSLoadBundleOperation LoadBundleFile(PackageBundle bundle)
+    {
+        var operation = new WechatLoadBundleOperation(this, bundle);
+        OperationSystem.StartOperation(PackageName, operation);
+        return operation;
+    }
+
+    /// <summary>
+    /// 资源文件卸载
+    /// </summary>
+    public override void UnloadBundleFile(PackageBundle bundle, object result)
+    {
+        AssetBundle assetBundle = result as AssetBundle;
+        if (assetBundle != null)
+            assetBundle.WXUnload(true);
+    }
+
+
+    /// <summary>
+    /// 重写资源文件加载类
+    /// </summary>
+    internal class WechatLoadBundleOperation : FSLoadBundleOperation
+    {
+        private enum ESteps
+        {
+            None,
+            LoadBundleFile,
+            Done,
+        }
+
+        private readonly WechatFileSystem _fileSystem;
+        private readonly PackageBundle _bundle;
+        private UnityWebRequest _webRequest;
+        private ESteps _steps = ESteps.None;
+
+
+        internal WechatLoadBundleOperation(WechatFileSystem fileSystem, PackageBundle bundle)
+        {
+            _fileSystem = fileSystem;
+            _bundle = bundle;
+        }
+        internal override void InternalOnStart()
+        {
+            _steps = ESteps.LoadBundleFile;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.LoadBundleFile)
+            {
+                if (_webRequest == null)
+                {
+                    string mainURL = _fileSystem.RemoteServices.GetRemoteMainURL(_bundle.FileName);
+                    _webRequest = WXAssetBundle.GetAssetBundle(mainURL);
+                    _webRequest.SendWebRequest();
+                }
+
+                DownloadProgress = _webRequest.downloadProgress;
+                DownloadedBytes = (long)_webRequest.downloadedBytes;
+                Progress = DownloadProgress;
+                if (_webRequest.isDone == false)
+                    return;
+
+                if (CheckRequestResult())
+                {
+                    _steps = ESteps.Done;
+                    Result = (_webRequest.downloadHandler as DownloadHandlerWXAssetBundle).assetBundle;
+                    Status = EOperationStatus.Succeed;
+                }
+                else
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Failed;
+                }
+            }
+        }
+
+        public override void WaitForAsyncComplete()
+        {
+            if (IsDone == false)
+            {
+                _steps = ESteps.Done;
+                Status = EOperationStatus.Failed;
+                Error = "WebGL platform not support sync load method !";
+                UnityEngine.Debug.LogError(Error);
+            }
+        }
+        public override void AbortDownloadOperation()
+        {
+        }
+
+        private bool CheckRequestResult()
+        {
+#if UNITY_2020_3_OR_NEWER
+            if (_webRequest.result != UnityWebRequest.Result.Success)
+            {
+                Error = _webRequest.error;
+                return false;
+            }
+            else
+            {
+                return true;
+            }
+#else
+            if (_webRequest.isNetworkError || _webRequest.isHttpError)
+            {
+                Error = _webRequest.error;
+                return false;
+            }
+            else
+            {
+                return true;
+            }
+#endif
+        }
+    }
+}
+#endif
\ No newline at end of file
diff --git a/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/WechatFileSystem.cs.meta b/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/WechatFileSystem.cs.meta
new file mode 100644
index 00000000..abc313fe
--- /dev/null
+++ b/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/WechatFileSystem.cs.meta	
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 97f01c24ae799f34393a4362f33a0e1f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/YooAsset.RuntimeExtension.asmdef b/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/YooAsset.RuntimeExtension.asmdef
index ad3d122b..14406816 100644
--- a/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/YooAsset.RuntimeExtension.asmdef	
+++ b/Assets/YooAsset/Samples~/Extension Sample/Scripts/Runtime/YooAsset.RuntimeExtension.asmdef	
@@ -2,7 +2,8 @@
     "name": "YooAsset.RuntimeExtension",
     "rootNamespace": "",
     "references": [
-        "GUID:e34a5702dd353724aa315fb8011f08c3"
+        "GUID:e34a5702dd353724aa315fb8011f08c3",
+        "GUID:5efd170ecd8084500bed5692932fe14e"
     ],
     "includePlatforms": [],
     "excludePlatforms": [],