diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteCardInvoiceExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteCardInvoiceExtensions.cs
index c7e3edc3..87dc96d4 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteCardInvoiceExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteCardInvoiceExtensions.cs
@@ -175,7 +175,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
             if (request.AppId == null)
                 request.AppId = client.Credentials.AppId;
 
-            if (request.CardExtra != null && string.IsNullOrEmpty(request.CardExtra.Nonce))
+            if (request.CardExtra != null && request.CardExtra.Nonce == null)
                 request.CardExtra.Nonce = Guid.NewGuid().ToString("N");
 
             IFlurlRequest flurlReq = client
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteUnionPromoterExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteUnionPromoterExtensions.cs
index 49dfd12e..400aeb5e 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteUnionPromoterExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteUnionPromoterExtensions.cs
@@ -138,34 +138,34 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
                 .SetQueryParam("from", request.Offset)
                 .SetQueryParam("limit", request.Limit);
 
-            if (request.QueryType.HasValue)
+            if (request.QueryType != null)
                 flurlReq.SetQueryParam("queryType", request.QueryType.Value);
 
             if (request.Query != null)
                 flurlReq.SetQueryParam("query", request.Query);
 
-            if (request.MaxPrice.HasValue)
+            if (request.MaxPrice != null)
                 flurlReq.SetQueryParam("maxPrice", request.MaxPrice.Value);
 
-            if (request.MinPrice.HasValue)
+            if (request.MinPrice != null)
                 flurlReq.SetQueryParam("minPrice", request.MinPrice.Value);
 
-            if (request.MinCommissionValue.HasValue)
+            if (request.MinCommissionValue != null)
                 flurlReq.SetQueryParam("minCommissionValue", request.MinCommissionValue.Value);
 
-            if (request.MinCommissionRatio.HasValue)
+            if (request.MinCommissionRatio != null)
                 flurlReq.SetQueryParam("minCommissionRatio", request.MinCommissionRatio.Value);
 
-            if (request.SortType.HasValue)
+            if (request.SortType != null)
                 flurlReq.SetQueryParam("sortType", request.SortType.Value);
 
-            if (request.HasCoupon.HasValue)
+            if (request.HasCoupon != null)
                 flurlReq.SetQueryParam("hasCoupon", request.HasCoupon.Value ? 1 : 0);
 
             if (request.ShopAppIdList != null)
                 flurlReq.SetQueryParam("shopAppIds", string.Join(",", request.ShopAppIdList));
 
-            if (request.CategoryId.HasValue)
+            if (request.CategoryId != null)
                 flurlReq.SetQueryParam("categoryId", request.CategoryId);
 
             if (request.CategoryIdList != null)
@@ -199,28 +199,28 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
                 .SetQueryParam("from", request.Offset)
                 .SetQueryParam("limit", request.Limit);
 
-            if (request.MaxPrice.HasValue)
+            if (request.MaxPrice != null)
                 flurlReq.SetQueryParam("maxPrice", request.MaxPrice.Value);
 
-            if (request.MinPrice.HasValue)
+            if (request.MinPrice != null)
                 flurlReq.SetQueryParam("minPrice", request.MinPrice.Value);
 
-            if (request.MinCommissionValue.HasValue)
+            if (request.MinCommissionValue != null)
                 flurlReq.SetQueryParam("minCommissionValue", request.MinCommissionValue.Value);
 
-            if (request.MinCommissionRatio.HasValue)
+            if (request.MinCommissionRatio != null)
                 flurlReq.SetQueryParam("minCommissionRatio", request.MinCommissionRatio.Value);
 
-            if (request.SortType.HasValue)
+            if (request.SortType != null)
                 flurlReq.SetQueryParam("sortType", request.SortType.Value);
 
-            if (request.HasCoupon.HasValue)
+            if (request.HasCoupon != null)
                 flurlReq.SetQueryParam("hasCoupon", request.HasCoupon.Value ? 1 : 0);
 
             if (request.ShopAppIdList != null)
                 flurlReq.SetQueryParam("shopAppIds", string.Join(",", request.ShopAppIdList));
 
-            if (request.CategoryId.HasValue)
+            if (request.CategoryId != null)
                 flurlReq.SetQueryParam("categoryId", request.CategoryId);
 
             if (request.CategoryIdList != null)
@@ -302,10 +302,10 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
                 .SetQueryParam("access_token", request.AccessToken)
                 .SetQueryParam("page", request.Page);
 
-            if (request.StartTimestamp.HasValue)
+            if (request.StartTimestamp != null)
                 flurlReq.SetQueryParam("startTimestamp", request.StartTimestamp.Value);
 
-            if (request.EndTimestamp.HasValue)
+            if (request.EndTimestamp != null)
                 flurlReq.SetQueryParam("endTimestamp", request.EndTimestamp.Value);
 
             if (request.CommissionStatus != null)
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaApiExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaApiExtensions.cs
index fc6cbfc6..9d41e00f 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaApiExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaApiExtensions.cs
@@ -163,7 +163,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
                 .SetQueryParam("page", request.Page)
                 .SetQueryParam("num", request.Limit);
 
-            if (request.Type.HasValue)
+            if (request.Type != null)
                 flurlReq.SetQueryParam("type", request.Type);
 
             return await client.SendRequestWithJsonAsync<Models.WxaApiFeedbackListResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
@@ -301,13 +301,13 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
             if (request.FilterMessage != null)
                 flurlReq.SetQueryParam("filterMsg", request.FilterMessage);
 
-            if (request.LogLevel.HasValue)
+            if (request.LogLevel != null)
                 flurlReq.SetQueryParam("level", request.LogLevel.Value);
 
-            if (request.Offset.HasValue)
+            if (request.Offset != null)
                 flurlReq.SetQueryParam("start", request.Offset.Value);
 
-            if (request.Limit.HasValue)
+            if (request.Limit != null)
                 flurlReq.SetQueryParam("limit", request.Limit.Value);
 
             return await client.SendRequestWithJsonAsync<Models.WxaApiUserLogSearchResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
@@ -994,13 +994,13 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
             if (request.Keyword != null)
                 flurlReq.SetQueryParam("keyword", request.Keyword);
 
-            if (request.Role.HasValue)
+            if (request.Role != null)
                 flurlReq.SetQueryParam("role", request.Role.Value);
 
-            if (request.Offset.HasValue)
+            if (request.Offset != null)
                 flurlReq.SetQueryParam("offset", request.Offset.Value);
 
-            if (request.Limit.HasValue)
+            if (request.Limit != null)
                 flurlReq.SetQueryParam("limit", request.Limit.Value);
 
             return await client.SendRequestWithJsonAsync<Models.WxaApiBroadcastRoleGetRoleListResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaComponentExtensions.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaComponentExtensions.cs
index b664e5a9..4557c3d1 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaComponentExtensions.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/Extensions/WechatApiClientExecuteWxaComponentExtensions.cs
@@ -610,7 +610,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
             if (request.Action != null)
                 flurlReq.SetQueryParam("action", request.Action);
 
-            if (request.AppVersion.HasValue)
+            if (request.AppVersion != null)
                 flurlReq.SetQueryParam("app_version", request.AppVersion.Value);
 
             return await client.SendRequestWithJsonAsync<Models.WxaRevertCodeReleaseResponse>(flurlReq, data: request, cancellationToken: cancellationToken);
diff --git a/src/SKIT.FlurlHttpClient.Wechat.Api/WechatApiClient.cs b/src/SKIT.FlurlHttpClient.Wechat.Api/WechatApiClient.cs
index 9576994e..b8877006 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.Api/WechatApiClient.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.Api/WechatApiClient.cs
@@ -58,7 +58,7 @@ namespace SKIT.FlurlHttpClient.Wechat.Api
         {
             IFlurlRequest flurlRequest = FlurlClient.Request(urlSegments).WithVerb(method);
 
-            if (request.Timeout.HasValue)
+            if (request.Timeout != null)
             {
                 flurlRequest.WithTimeout(TimeSpan.FromMilliseconds(request.Timeout.Value));
             }