This special line is different from the traditional freight forwarding line on the market. It is only for the designated cooperative supermarkets of Mason, such as Walmart, Costco, Best buy, Home depot, Target and other five exclusive lines of supermarkets. The ports are the exclusive ports of independent large supermarkets in the United States. The customs clearance and delivery is carried out by the designated cooperative agent of the supermarket in the United States. All relevant regulations must be in accordance with the requirements of the supermarket. Since the information required by each supermarket is different, it should be added or simplified according to the actual situation.