diff --git a/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Options/WechatOptions.cs b/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Options/WechatOptions.cs
index ae90f871..676d56ea 100644
--- a/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Options/WechatOptions.cs
+++ b/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Options/WechatOptions.cs
@@ -14,7 +14,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Sample.Options
         public string CallbackToken { get; set; } = string.Empty;
     }
 
-    partial class WechatOptions
+    public partial class WechatOptions
     {
         public static class Types
         {
diff --git a/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/BackgroundServices/WechatAccessTokenRefreshingBackgroundService.cs b/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/BackgroundServices/WechatAccessTokenRefreshingBackgroundService.cs
index f1b07079..1e9a8461 100644
--- a/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/BackgroundServices/WechatAccessTokenRefreshingBackgroundService.cs
+++ b/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/BackgroundServices/WechatAccessTokenRefreshingBackgroundService.cs
@@ -12,7 +12,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Sample.Services.BackgroundServices
     using SKIT.FlurlHttpClient.Wechat.Api;
     using SKIT.FlurlHttpClient.Wechat.Api.Models;
 
-    class WechatAccessTokenRefreshingBackgroundService : BackgroundService
+    internal class WechatAccessTokenRefreshingBackgroundService : BackgroundService
     {
         private readonly ILogger _logger;
         private readonly Options.WechatOptions _wechatOptions;
@@ -70,7 +70,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Sample.Services.BackgroundServices
             if (!response.IsSuccessful())
             {
                 _logger.LogWarning(
-                    "刷新 AppId 为 {0} 微信 AccessToken 失败（状态码：{1}，错误代码：{2}，错误描述：{3}）。", 
+                    "刷新 AppId 为 {0} 微信 AccessToken 失败（状态码：{1}，错误代码：{2}，错误描述：{3}）。",
                     appId, response.RawStatus, response.ErrorCode, response.ErrorMessage
                 );
                 return; // 请求失败
diff --git a/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/DistributedLock/Implements/DistributedLockFactory.cs b/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/DistributedLock/Implements/DistributedLockFactory.cs
index f8a2f238..717f730a 100644
--- a/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/DistributedLock/Implements/DistributedLockFactory.cs
+++ b/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/DistributedLock/Implements/DistributedLockFactory.cs
@@ -5,7 +5,7 @@ using Medallion.Threading.FileSystem;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.Sample.Services.DistributedLock.Implements
 {
-    class DistributedLockFactory : IDistributedLockFactory
+    internal class DistributedLockFactory : IDistributedLockFactory
     {
         private readonly DirectoryInfo _lockFileDirectory = new DirectoryInfo(Environment.CurrentDirectory);
 
diff --git a/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/HttpClients/Implements/WechatApiHttpClientFactory.cs b/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/HttpClients/Implements/WechatApiHttpClientFactory.cs
index ed1a4539..b12db1f5 100644
--- a/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/HttpClients/Implements/WechatApiHttpClientFactory.cs
+++ b/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Services/HttpClients/Implements/WechatApiHttpClientFactory.cs
@@ -5,7 +5,7 @@ using Microsoft.Extensions.Options;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.Sample.Services.HttpClients.Implements
 {
-    partial class WechatApiHttpClientFactory : IWechatApiHttpClientFactory
+    internal partial class WechatApiHttpClientFactory : IWechatApiHttpClientFactory
     {
         private readonly IHttpClientFactory _httpClientFactory;
         private readonly Options.WechatOptions _wechatOptions;
@@ -40,7 +40,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.Sample.Services.HttpClients.Implements
         }
     }
 
-    partial class WechatApiHttpClientFactory
+    internal partial class WechatApiHttpClientFactory
     {
         internal class DelegatingFlurlClientFactory : Flurl.Http.Configuration.DefaultHttpClientFactory
         {
diff --git a/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Startup.cs b/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Startup.cs
index 8fa8ee20..557fd7ee 100644
--- a/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Startup.cs
+++ b/samples/SKIT.FlurlHttpClient.Wechat.Api.Sample_Net6/Startup.cs
@@ -1,10 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/Newtonsoft.Json/Array[String]/TextualStringArrayWithPipeSplitConverter.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/Newtonsoft.Json/Array[String]/TextualStringArrayWithPipeSplitConverter.cs
index b188a8a0..4ee5f811 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/Newtonsoft.Json/Array[String]/TextualStringArrayWithPipeSplitConverter.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/Newtonsoft.Json/Array[String]/TextualStringArrayWithPipeSplitConverter.cs
@@ -1,6 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
 
 namespace Newtonsoft.Json.Converters
 {
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/Newtonsoft.Json/Array[String]/TextualStringArrayWithSemicolonSplitConverter.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/Newtonsoft.Json/Array[String]/TextualStringArrayWithSemicolonSplitConverter.cs
index d1486db0..ff051e2c 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/Newtonsoft.Json/Array[String]/TextualStringArrayWithSemicolonSplitConverter.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/Newtonsoft.Json/Array[String]/TextualStringArrayWithSemicolonSplitConverter.cs
@@ -1,6 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
 
 namespace Newtonsoft.Json.Converters
 {
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/System.Text.Json/Array[String]/TextualStringArrayWithPipeSplitConverter.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/System.Text.Json/Array[String]/TextualStringArrayWithPipeSplitConverter.cs
index 4e51fc92..6d567988 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/System.Text.Json/Array[String]/TextualStringArrayWithPipeSplitConverter.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/System.Text.Json/Array[String]/TextualStringArrayWithPipeSplitConverter.cs
@@ -1,6 +1,4 @@
-using System.Collections.Generic;
-using System.Linq;
-using System.Text.Json.Serialization;
+using System.Text.Json.Serialization;
 
 namespace System.Text.Json.Converters
 {
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/System.Text.Json/Array[String]/TextualStringArrayWithSemicolonSplitConverter.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/System.Text.Json/Array[String]/TextualStringArrayWithSemicolonSplitConverter.cs
index 28e438d7..bd942655 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/System.Text.Json/Array[String]/TextualStringArrayWithSemicolonSplitConverter.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Converters/Internal/System.Text.Json/Array[String]/TextualStringArrayWithSemicolonSplitConverter.cs
@@ -1,6 +1,4 @@
-using System.Collections.Generic;
-using System.Linq;
-using System.Text.Json.Serialization;
+using System.Text.Json.Serialization;
 
 namespace System.Text.Json.Converters
 {
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/NearybyPOI/WxaAddNearbyPOIRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/NearybyPOI/WxaAddNearbyPOIRequest.cs
index da166564..0e0dc326 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/NearybyPOI/WxaAddNearbyPOIRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/NearybyPOI/WxaAddNearbyPOIRequest.cs
@@ -1,5 +1,4 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.Models
 {
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/WxaStore/WxaAddStoreRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/WxaStore/WxaAddStoreRequest.cs
index ec89c391..2c556e78 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/WxaStore/WxaAddStoreRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/WxaStore/WxaAddStoreRequest.cs
@@ -1,5 +1,4 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.Models
 {
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/WxaStore/WxaUpdateStoreRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/WxaStore/WxaUpdateStoreRequest.cs
index 40a07a18..bd60906d 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/WxaStore/WxaUpdateStoreRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/Wxa/WxaStore/WxaUpdateStoreRequest.cs
@@ -1,6 +1,4 @@
-using System;
-
-namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
 {
     /// <summary>
     /// <para>表示 [POST] /wxa/update_store 接口的请求。</para>
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/WxaApi/Operation/WxaApiLogGetPerformanceResponse.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/WxaApi/Operation/WxaApiLogGetPerformanceResponse.cs
index 8a11e890..b98b56e2 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/WxaApi/Operation/WxaApiLogGetPerformanceResponse.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/WxaApi/Operation/WxaApiLogGetPerformanceResponse.cs
@@ -1,6 +1,4 @@
-using System;
-
-namespace SKIT.FlurlHttpClient.Wechat.Api.Models
+namespace SKIT.FlurlHttpClient.Wechat.Api.Models
 {
     /// <summary>
     /// <para>表示 [POST] /wxaapi/log/get_performance 接口的响应。</para>
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/WxaComponent/Code/WxaSubmitAuditRequest.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/WxaComponent/Code/WxaSubmitAuditRequest.cs
index aab5e183..bd373775 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Models/WxaComponent/Code/WxaSubmitAuditRequest.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Models/WxaComponent/Code/WxaSubmitAuditRequest.cs
@@ -1,6 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
+using System.Collections.Generic;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.Models
 {
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_AESUtilityTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_AESUtilityTests.cs
index 773e1df8..f4f9d9b6 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_AESUtilityTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_AESUtilityTests.cs
@@ -1,5 +1,4 @@
-using System;
-using Xunit;
+using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
 {
@@ -11,10 +10,10 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
             string iv = "KEWv/gyiIwAfHvjrLeaX6w==";
             string key = "YZJqKnNFi0KAiKUc0ggC2g==";
             string cipherText = "Gu2PVnxVWl+jK4F8c0liGxfkB5Bj3m5HRvwgEIk1Yb+36RZ3Bg7YmUnud/ooiHz0PQroipsH7GCjlGwUeT04NwmrFaP1y3dRYPLpS43ed9QZWcFIFo+8vTs3Zco6S98DUvaNEAs8duhz/BzfBOZaIHMziRqEtPFI0ZDzCgJluBirJ6Wl3UkygZ5/QLo3KA53qGdip7K48Rq8XbCwuidTCw==";
-            
+
             string expectedPlainData = "{\"phoneNumber\":\"186****5613\",\"purePhoneNumber\":\"186****5613\",\"countryCode\":\"86\",\"watermark\":{\"timestamp\":1634545675,\"appid\":\"wxc****17e87e0e0a7\"}}";
             string actualPlainData = Utilities.AESUtility.DecryptWithCBC(encodingKey: key, encodingIV: iv, encodingCipherText: cipherText);
-            
+
             Assert.Equal(expectedPlainData, actualPlainData, ignoreCase: true);
         }
     }
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCVTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCVTests.cs
index 214a372b..459c2fab 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCVTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCVTests.cs
@@ -1,7 +1,5 @@
 using System;
-using System.Collections.Generic;
 using System.Linq;
-using System.Threading;
 using System.Threading.Tasks;
 using Xunit;
 
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMaterialTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMaterialTests.cs
index e3e82109..c505171f 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMaterialTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMaterialTests.cs
@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
+using System.Linq;
 using System.Threading.Tasks;
 using Xunit;
 
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMediaTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMediaTests.cs
index 92f9bb39..63db44be 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMediaTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMediaTests.cs
@@ -1,7 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
 using System.Threading.Tasks;
 using Xunit;
 
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMessageMassTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMessageMassTests.cs
index abbbda70..5bf07fed 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMessageMassTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinMessageMassTests.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
@@ -35,7 +31,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
                 ToUserOpenId = TestConfigs.WechatOpenId,
                 MessageType = "text",
                 MessageContentForText = new Models.CgibinMessageMassPreviewRequest.Types.TextMessage()
-                { 
+                {
                     Content = "FAKE_CONTENT"
                 },
                 AccessToken = TestConfigs.WechatAccessToken
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinQrcodeTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinQrcodeTests.cs
index e5ed42b5..d9b3b448 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinQrcodeTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinQrcodeTests.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
@@ -18,9 +14,9 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
                 ExpiresIn = 30,
                 ActionType = "QR_STR_SCENE",
                 Action = new Models.CgibinQrcodeCreateRequest.Types.Action()
-                { 
+                {
                     Scene = new Models.CgibinQrcodeCreateRequest.Types.Action.Types.Scene()
-                    { 
+                    {
                         SceneString = "FAKE_SCENESTR"
                     }
                 }
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinTagsTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinTagsTests.cs
index eb3138fc..7784a695 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinTagsTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinTagsTests.cs
@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
+using System.Linq;
 using System.Threading.Tasks;
 using Xunit;
 
@@ -15,9 +12,9 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
             var request = new Models.CgibinTagsCreateRequest()
             {
                 AccessToken = TestConfigs.WechatAccessToken,
-                Tag = new Models.CgibinTagsCreateRequest.Types.Tag() 
-                { 
-                    Name = "FAKE_TAGNAME" 
+                Tag = new Models.CgibinTagsCreateRequest.Types.Tag()
+                {
+                    Name = "FAKE_TAGNAME"
                 }
             };
             var response = await TestClients.Instance.ExecuteCgibinTagsCreateAsync(request);
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinTests.cs
index e293df2a..9931392a 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinTests.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinUserTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinUserTests.cs
index 591b1025..69a686d6 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinUserTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteCgibinUserTests.cs
@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
+using System.Linq;
 using System.Threading.Tasks;
 using Xunit;
 
@@ -20,7 +17,6 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
             var response = await TestClients.Instance.ExecuteCgibinUserInfoAsync(request);
 
             Assert.NotEmpty(response.OpenId);
-            Assert.NotEmpty(response.Nickname);
             Assert.True(response.IsSubscribed);
         }
 
@@ -30,8 +26,8 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
             var request = new Models.CgibinUserInfoBatchGetRequest()
             {
                 AccessToken = TestConfigs.WechatAccessToken,
-                UserList = new Models.CgibinUserInfoBatchGetRequest.Types.User[] 
-                { 
+                UserList = new Models.CgibinUserInfoBatchGetRequest.Types.User[]
+                {
                     new Models.CgibinUserInfoBatchGetRequest.Types.User() { OpenId = TestConfigs.WechatOpenId }
                 }
             };
@@ -39,7 +35,6 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
 
             Assert.NotEmpty(response.UserList);
             Assert.NotEmpty(response.UserList.First().OpenId);
-            Assert.NotEmpty(response.UserList.First().Nickname);
             Assert.True(response.UserList.First().IsSubscribed);
         }
 
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSemanticTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSemanticTests.cs
index f10253b7..8b1d1b0a 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSemanticTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSemanticTests.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSnsWithAccessTokenTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSnsWithAccessTokenTests.cs
index 7d1e11f0..3edfb346 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSnsWithAccessTokenTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSnsWithAccessTokenTests.cs
@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Threading;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSnsWithAppSecretTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSnsWithAppSecretTests.cs
index 710f478f..829259c7 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSnsWithAppSecretTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteSnsWithAppSecretTests.cs
@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Threading;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
@@ -34,7 +31,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
             Assert.NotNull(response.AccessToken);
             Assert.NotNull(response.RefreshToken);
         }
-        
+
         [Fact(DisplayName = "测试用例：调用 API [GET] /sns/jscode2session")]
         public async Task TestExecuteSnsJsCode2Session()
         {
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteWxaApiTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteWxaApiTests.cs
index 4839b9c9..af4b77b3 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteWxaApiTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_ApiExecuteWxaApiTests.cs
@@ -1,7 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
 using System.Threading.Tasks;
 using Xunit;
 
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_CodeReviewAnalyzer.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_CodeReviewAnalyzer.cs
index c3b9e4d6..f95386cb 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_CodeReviewAnalyzer.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_CodeReviewAnalyzer.cs
@@ -1,10 +1,5 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
+using System.IO;
 using System.Reflection;
-using System.Threading;
-using System.Threading.Tasks;
 using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_DeliveryRequestSignatureTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_DeliveryRequestSignatureTests.cs
index b547ed5d..0e69099a 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_DeliveryRequestSignatureTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_DeliveryRequestSignatureTests.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
@@ -13,7 +9,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
         public async Task TestDeliveryRequestSignature()
         {
             var client = new WechatApiClient(new WechatApiClientOptions()
-            { 
+            {
                 AppId = "",
                 AppSecret = "",
                 ImmeDeliveryAppKey = "test_shop_id",
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_EventDeserializationTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_EventDeserializationTests.cs
index d64dcf59..13c454ab 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_EventDeserializationTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_EventDeserializationTests.cs
@@ -1,9 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
-using System.Xml.Linq;
+using System.Xml.Linq;
 using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_EventVerificationTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_EventVerificationTests.cs
index 65c5fad8..76fa5db2 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_EventVerificationTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_EventVerificationTests.cs
@@ -1,10 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
-using System.Xml.Linq;
-using Xunit;
+using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
 {
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_HashUtilityTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_HashUtilityTests.cs
index 975d5b20..27096caf 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_HashUtilityTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_HashUtilityTests.cs
@@ -1,5 +1,4 @@
-using System;
-using Xunit;
+using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
 {
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_MidasRequestSignatureTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_MidasRequestSignatureTests.cs
index ae33085d..eaf38e62 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_MidasRequestSignatureTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_MidasRequestSignatureTests.cs
@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
@@ -13,7 +9,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
         public async Task TestMidasRequestSignature()
         {
             var client = new WechatApiClient(new WechatApiClientOptions()
-            { 
+            {
                 AppId = "wx1234567",
                 AppSecret = "",
                 MidasAppKey = "zNLgAGgqsEWJOg1nFVaO5r7fAlIQxr1u"
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_WxBizMsgCryptorUtilityTests.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_WxBizMsgCryptorUtilityTests.cs
index 050a751f..7cb7e7fe 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_WxBizMsgCryptorUtilityTests.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestCase_WxBizMsgCryptorUtilityTests.cs
@@ -1,10 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading;
-using System.Threading.Tasks;
-using Xunit;
+using Xunit;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
 {
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestClients.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestClients.cs
index 193cb226..cff893f6 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestClients.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestClients.cs
@@ -1,15 +1,13 @@
-using System;
-
-namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
+namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
 {
-    class TestClients
+    internal class TestClients
     {
         static TestClients()
         {
             Instance = new WechatApiClient(new WechatApiClientOptions()
-            { 
+            {
                 AppId = TestConfigs.WechatAppId,
-                AppSecret =  TestConfigs.WechatAppSecret
+                AppSecret = TestConfigs.WechatAppSecret
             });
         }
 
diff --git a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestConfigs.cs b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestConfigs.cs
index 935345b5..4c3d861b 100644
--- a/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestConfigs.cs
+++ b/test/SKIT.FlurlHttpClient.Wechat.Api.UnitTests/TestConfigs.cs
@@ -4,7 +4,7 @@ using System.Text.Json;
 
 namespace SKIT.FlurlHttpClient.Wechat.Api.UnitTests
 {
-    class TestConfigs
+    internal class TestConfigs
     {
         static TestConfigs()
         {