private XH_SpotPosition GetSpotPositionByBreedClassIDFromWCF(int id)
 {
     try
     {
         using (SpotTradeRulesClient client = GetClient())
             return(client.GetSpotPositionByBreedClassID(id));
     }
     catch (Exception ex)
     {
         string errCode = "GT-8109";
         string errMsg  = "无法从管理中心获取现货品种持仓限制。";
         throw new VTException(errCode, errMsg, ex);
     }
 }