diff --git a/BBWY.1688SDK/serialize/Param2RequestSerializer.cs b/BBWY.1688SDK/serialize/Param2RequestSerializer.cs
index 3e9878bb..29093c7d 100644
--- a/BBWY.1688SDK/serialize/Param2RequestSerializer.cs
+++ b/BBWY.1688SDK/serialize/Param2RequestSerializer.cs
@@ -116,13 +116,18 @@ namespace com.alibaba.openapi.client.serialize
             {
                 var value = property.GetValue(param);
                 var valueType = value.GetType();
-                if (valueType.IsClass)
-                {
-                    result.Add(property.Name, JsonConvert.SerializeObject(value));
-                }
+                if (valueType.IsAssignableFrom(typeof(string)) ||
+                    valueType.IsAssignableFrom(typeof(bool?)) ||
+                    valueType.IsAssignableFrom(typeof(byte?)) ||
+                    valueType.IsAssignableFrom(typeof(char?)) ||
+                    valueType.IsAssignableFrom(typeof(double?)) ||
+                    valueType.IsAssignableFrom(typeof(float?)) ||
+                    valueType.IsAssignableFrom(typeof(int?)) ||
+                    valueType.IsAssignableFrom(typeof(long?)))
+                    result.Add(property.Name, value);
                 else
                 {
-                    result.Add(property.Name, value);
+                    result.Add(property.Name, JsonConvert.SerializeObject(value));
                 }
             }
             return result;
diff --git a/BBWY.Server.Business/PlatformSDK/_1688Business.cs b/BBWY.Server.Business/PlatformSDK/_1688Business.cs
index 1bca45d4..6601504a 100644
--- a/BBWY.Server.Business/PlatformSDK/_1688Business.cs
+++ b/BBWY.Server.Business/PlatformSDK/_1688Business.cs
@@ -71,7 +71,7 @@ namespace BBWY.Server.Business
             {
                 param.cargoParamList.Add(new CargoParam()
                 {
-                    offerId = long.Parse(cargo.SkuId),
+                    offerId = long.Parse(cargo.ProductId),
                     specId = cargo.SpecId,
                     quantity = cargo.Quantity
                 });
@@ -82,7 +82,7 @@ namespace BBWY.Server.Business
             var result = client.NewRequest(request, reqPolicy);
             if (result.Value<bool>("success") != true)
             {
-                throw new BusinessException(result.Value<string>("errorMsg")) { Code = result.Value<int>("errorCode") };
+                throw new BusinessException(result.Value<string>("errorMsg")) { Code = 0 };
             }
 
             return new PreviewOrderResponse()