A partner supplier can get more orders. Now TOPC logistics service is connected to 82EC. Reward for suggestions about TOPC. Port Charges of Common China Ports. The consignor or consignee entrusts us to deal with exit and entry procedures of goods or means of transport and related customs matters, such as declare to customs, submit documents, apply for tax refund, accept inspection and so on. 1Efficient, professional and targeted customs declaration service.