diff --git a/Docs/AssetBundleBuilder.md b/Docs/AssetBundleBuilder.md
index 309dc6c..4dbfbef 100644
--- a/Docs/AssetBundleBuilder.md
+++ b/Docs/AssetBundleBuilder.md
@@ -52,6 +52,20 @@
 
   (4) BundleName_HashName_Extension：资源包名+哈希值+后缀名
 
+ - **Copy Buildin File Option**
+
+   首包资源文件的拷贝方式
+
+   (1) None：不拷贝任何文件
+
+   (2) ClearAndCopyAll：先清空已有文件，然后拷贝所有文件
+
+   (3) ClearAndCopyByTags：先清空已有文件，然后按照资源标签拷贝文件
+
+   (4) OnlyCopyAll：不清空已有文件，直接拷贝所有文件
+
+   (5) OnlyCopyByTags：不清空已有文件，直接按照资源标签拷贝文件
+
 - **构建**
 
   点击构建按钮会开始构建流程，构建流程分为多个节点顺序执行，如果某个节点发生错误，会导致构建失败。错误信息可以在控制台查看。
@@ -126,6 +140,7 @@ private static void BuildInternal(BuildTarget buildTarget)
     buildParameters.EncryptionServices = new GameEncryption();
     buildParameters.CompressOption = ECompressOption.LZ4;
     buildParameters.OutputNameStyle = EOutputNameStyle.HashName_Extension;
+    buildParameters.CopyBuildinFileOption = ECopyBuildinFileOption.None;
     
     // 执行构建
     AssetBundleBuilder builder = new AssetBundleBuilder();
diff --git a/Docs/AssetBundleCollector.md b/Docs/AssetBundleCollector.md
index 0f99b94..ac9d48b 100644
--- a/Docs/AssetBundleCollector.md
+++ b/Docs/AssetBundleCollector.md
@@ -10,6 +10,10 @@
 
 #### 公共设置
 
+- Show Packages
+
+  是否展示资源包列表视图。
+  
 - Enable Addressable
 
   启用可寻址资源定位系统。
diff --git a/Docs/CodeTutorial1.md b/Docs/CodeTutorial1.md
index 2ad86b4..3e780a8 100644
--- a/Docs/CodeTutorial1.md
+++ b/Docs/CodeTutorial1.md
@@ -3,7 +3,14 @@
 初始化资源系统
 
 ```c#
+// 初始化资源系统
 YooAssets.Initialize();
+
+// 创建默认的资源包
+var defaultPackage = YooAssets.CreateAssetsPackage("DefaultPackage");
+
+// 设置该资源包为默认的资源包，可以使用YooAssets相关加载接口加载该资源包内容。
+YooAssets.SetDefaultAssetsPackage(defaultPackage);
 ```
 
 资源系统的运行模式支持三种：编辑器模拟模式，单机运行模式，联机运行模式。
@@ -17,10 +24,10 @@ YooAssets.Initialize();
 ````c#
 private IEnumerator InitializeYooAsset()
 {
-    var initParameters = new YooAssets.EditorSimulateModeParameters();
+    var initParameters = new EditorSimulateModeParameters();
     initParameters.LocationServices = new DefaultLocationServices("Assets/GameRes");
-    initParameters.SimulatePatchManifestPath = EditorSimulateModeHelper.SimulateBuild("DefaultPackage", false);
-    yield return YooAssets.InitializeAsync(initParameters);
+    initParameters.SimulatePatchManifestPath = EditorSimulateModeHelper.SimulateBuild("DefaultPackage");
+    yield return defaultPackage.InitializeAsync(initParameters);
 }
 ````
 
@@ -33,9 +40,9 @@ private IEnumerator InitializeYooAsset()
 ````c#
 private IEnumerator InitializeYooAsset()
 {
-    var initParameters = new YooAssets.OfflinePlayModeParameters();
+    var initParameters = new OfflinePlayModeParameters();
     initParameters.LocationServices = new DefaultLocationServices("Assets/GameRes");
-    yield return YooAssets.InitializeAsync(initParameters);
+    yield return defaultPackage.InitializeAsync(initParameters);
 }
 ````
 
@@ -55,22 +62,22 @@ private IEnumerator InitializeYooAsset()
   
 - DecryptionServices : 如果资源包在构建的时候有加密，需要提供实现IDecryptionServices接口的实例类。
 
+- QueryServices：内置资源查询服务接口。
+
 - DefaultHostServer : 默认的资源服务器IP地址。
 
 - FallbackHostServer : 备用的资源服务器IP地址。
 
-- VerifyLevel : 下载文件校验等级
-
 ````c#
 private IEnumerator InitializeYooAsset()
 {
-    var initParameters = new YooAssets.HostPlayModeParameters();
+    var initParameters = new HostPlayModeParameters();
     initParameters.LocationServices = new DefaultLocationServices("Assets/GameRes");
     initParameters.DecryptionServices = new BundleDecryptionServices();
     initParameters.QueryServices = new QueryStreamingAssetsServices();
     initParameters.DefaultHostServer = "http://127.0.0.1/CDN1/Android/v1.0";
     initParameters.FallbackHostServer = "http://127.0.0.1/CDN2/Android/v1.0";
-    yield return YooAssets.InitializeAsync(initParameters);
+    yield return defaultPackage.InitializeAsync(initParameters);
 }
 
 // 文件解密服务类
@@ -88,7 +95,8 @@ private class QueryStreamingAssetsServices : IQueryServices
     public bool QueryStreamingAssets(string fileName)
     {
         // 注意：使用了BetterStreamingAssets插件
-        return BetterStreamingAssets.FileExists($"YooAssets/{fileName}");
+        string buildinFolderName = YooAssets.GetStreamingAssetBuildinFolderName();
+        return BetterStreamingAssets.FileExists($"{buildinFolderName}/{fileName}");
     }
 }
 ````
diff --git a/Docs/CodeTutorial2.md b/Docs/CodeTutorial2.md
index 013a8af..d6f15f4 100644
--- a/Docs/CodeTutorial2.md
+++ b/Docs/CodeTutorial2.md
@@ -9,7 +9,8 @@
 ````c#
 private IEnumerator UpdateStaticVersion()
 {
-    UpdateStaticVersionOperation operation = YooAssets.UpdateStaticVersionAsync();
+    var package = YooAssets.GetAssetsPackage("DefaultPackage");
+    UpdateStaticVersionOperation operation = package.UpdateStaticVersionAsync();
     yield return operation;
 
     if (operation.Status == EOperationStatus.Succeed)
@@ -33,7 +34,8 @@ private IEnumerator UpdateStaticVersion()
 ````c#
 private IEnumerator UpdatePatchManifest()
 {
-    UpdateManifestOperation operation = YooAssets.UpdateManifestAsync(packageCRC);
+    var package = YooAssets.GetAssetsPackage("DefaultPackage");
+    UpdateManifestOperation operation = package.UpdateManifestAsync(packageCRC);
     yield return operation;
 
     if (operation.Status == EOperationStatus.Succeed)
@@ -56,15 +58,15 @@ private IEnumerator UpdatePatchManifest()
 
 补丁包下载接口：
 
-- YooAssets.CreatePatchDownloader(int downloadingMaxNumber, int failedTryAgain)
+- YooAssets.CreatePatchDownloader(int downloadingMaxNumber, int failedTryAgain, int timeout)
 
   用于下载更新当前资源版本所有的资源包文件。
 
-- YooAssets.CreatePatchDownloader(string[] tags, int downloadingMaxNumber, int failedTryAgain)
+- YooAssets.CreatePatchDownloader(string[] tags, int downloadingMaxNumber, int failedTryAgain, int timeout)
 
   用于下载更新资源标签指定的资源包文件。
 
-- YooAssets.CreateBundleDownloader(string[] locations, int downloadingMaxNumber, int failedTryAgain)
+- YooAssets.CreateBundleDownloader(string[] locations, int downloadingMaxNumber, int failedTryAgain, int timeout)
 
   用于下载更新指定的资源列表依赖的资源包文件。
 
@@ -73,7 +75,8 @@ IEnumerator Download()
 {
     int downloadingMaxNum = 10;
     int failedTryAgain = 3;
-    DownloaderOperation downloader = YooAssets.CreatePatchDownloader(downloadingMaxNum, failedTryAgain);
+    int timeout = 60;
+    var downloader = YooAssets.CreatePatchDownloader(downloadingMaxNum, failedTryAgain, timeout);
     
     //没有需要下载的资源
     if (downloader.TotalDownloadCount == 0)
@@ -114,7 +117,8 @@ IEnumerator Download()
 ````c#
 private IEnumerator UpdateStaticVersion()
 {
-    UpdateStaticVersionOperation operation = YooAssets.UpdateStaticVersionAsync(10);
+    var package = YooAssets.GetAssetsPackage("DefaultPackage");
+    UpdateStaticVersionOperation operation = package.UpdateStaticVersionAsync(10);
     yield return operation;
     if (operation.Status == EOperationStatus.Succeed)
     {
@@ -135,7 +139,7 @@ private IEnumerator UpdateStaticVersion()
         }
         
         // 在弱联网情况下更新补丁清单
-        UpdateManifestOperation operation2 = YooAssets.WeaklyUpdateManifestAsync(packageCRC);
+        UpdateManifestOperation operation2 = package.WeaklyUpdateManifestAsync(packageCRC);
         yield return operation2;
         if (operation2.Status == EOperationStatus.Succeed)
         {
diff --git a/Docs/CodeTutorial3.md b/Docs/CodeTutorial3.md
index 27b5274..5b6c25a 100644
--- a/Docs/CodeTutorial3.md
+++ b/Docs/CodeTutorial3.md
@@ -18,9 +18,9 @@
 ```c#
 // 以工程内的音频文件为例："Assets/GameRes/Audio/bgMusic.mp3" 
 // 设定资源路径的根目录为："Assets/GameRes"，后续加载的资源定位地址填写相对路径："Audio/bgMusic"
-var createParameters = new YooAssets.EditorSimulateModeParameters();
+var createParameters = new EditorSimulateModeParameters();
 createParameters.LocationServices = new DefaultLocationServices("Assets/GameRes");
-yield return YooAssets.InitializeAsync(createParameters);
+yield return defaultPackage.InitializeAsync(createParameters);
 ......
 YooAssets.LoadAssetAsync<AudioClip>("Audio/bgMusic");
 ```
@@ -31,9 +31,9 @@ YooAssets.LoadAssetAsync<AudioClip>("Audio/bgMusic");
 // 以工程内的音频文件为例："Assets/GameRes/Audio/bgMusic.mp3" 
 // 需要在资源配置界面启用可寻址功能（Enable Addressable）。
 // 配置界面的可寻址规则为AddressByFileName，那么资源定位地址填写文件名称："bgMusic"
-var createParameters = new YooAssets.EditorSimulateModeParameters();
+var createParameters = new EditorSimulateModeParameters();
 createParameters.LocationServices = new AddressLocationServices();
-yield return YooAssets.InitializeAsync(createParameters);
+yield return defaultPackage.InitializeAsync(createParameters);
 ......
 YooAssets.LoadAssetAsync<AudioClip>("bgMusic");
 ````
@@ -104,7 +104,8 @@ IEnumerator Start()
 ````c#
 private void UnloadAssets()
 {
-    YooAssets.UnloadUnusedAssets();
+    var package = YooAssets.GetAssetsPackage("DefaultPackage");
+    package.UnloadUnusedAssets();
 }
 ````
 
diff --git a/Docs/CodeTutorial4.md b/Docs/CodeTutorial4.md
index 848ea54..b245431 100644
--- a/Docs/CodeTutorial4.md
+++ b/Docs/CodeTutorial4.md
@@ -65,7 +65,7 @@ go.transform.localScale    = Vector3.one;
 在运行游戏之前，请保证资源包可以构建成功！
 
 ```c#
-public static YooAssetPackage AssetPackage;
+public static AssetPackage DefaultPackage;
 
 IEnumerator Start()
 {
@@ -73,24 +73,24 @@ IEnumerator Start()
     YooAssets.Initialize();
     
     // 创建资源包实例
-    AssetPackage = YooAssets.CreateAssetPackage("DefaultPackage");
+    DefaultPackage = YooAssets.CreateAssetPackage("DefaultPackage");
     
     // 初始化资源包
     ......
-    yield return AssetPackage.InitializeAsync(createParameters);
+    yield return DefaultPackage.InitializeAsync(createParameters);
     
     // 更新资源包版本
     ......
-    var operation = AssetPackage.UpdateManifestAsync(packageCRC);
+    var operation = DefaultPackage.UpdateManifestAsync(packageCRC);
     yield return operation;
     
     // 下载更新文件
-    var downloader = AssetPackage.CreatePatchDownloader(downloadingMaxNum, failedTryAgain);
+    var downloader = DefaultPackage.CreatePatchDownloader(downloadingMaxNum, failedTryAgain);
     downloader.BeginDownload();
     yield return downloader;
     
     // 加载资源对象
-    var assetHandle = AssetPackage.LoadAssetAsync("Assets/GameRes/npc.prefab");
+    var assetHandle = DefaultPackage.LoadAssetAsync("Assets/GameRes/npc.prefab");
     yield return assetHandle;
     ......
 }
diff --git a/Docs/FAQ.md b/Docs/FAQ.md
index f96c29e..ddab281 100644
--- a/Docs/FAQ.md
+++ b/Docs/FAQ.md
@@ -17,6 +17,10 @@ windows平台添加命令: **-force-gles**
 
 YooAsset依赖于ScriptBuildPipeline（SBP），在PackageManager里找到SBP插件安装就可以了。
 
+#### 问题：使用FileZilla等FTP上传工具后，文件下载总是验证失败
+
+把传输类型修改为二进制就可以了。
+
 #### 问题：YooAsset支持Unity2018吗
 
 YooAsset分俩部分，编辑器代码和运行时代码。因为工具界面是使用UIElements编写的，所以在Unity2019以前的版本是使用不了界面化工具。但是这并没有影响我们使用YooAsset，以下提供一种解决方案。
diff --git a/Docs/Image/AssetBuilder-img1.png b/Docs/Image/AssetBuilder-img1.png
index 2500785..3ccc7e1 100644
Binary files a/Docs/Image/AssetBuilder-img1.png and b/Docs/Image/AssetBuilder-img1.png differ