public enum ContractAttribute
    {
        Agent = 0x01,
        KeyAccout = 0x02,
        HeadquaterCooperation = 0x04,
        FreighterULD = 0x08,
        TruckAirTruckUnloading = 0x10,
        TruckAirTruck = 0x20,
        WarehousingService = 0x40,
        Other = 0x80
    }