Having the integrity mark of China suppliers is equivalent to mastering the "golden key" to open the American market. The key is who will evaluate and guarantee the enterprise? American enterprises trust American intermediaries, and American-Asia Trade Association, a non-profit organization registered in the United States, provides credit guarantee for China suppliers, and at the same time, with Dunbar's credit certification and product quality insurance, which is the most effective measure to break the ice of Sino-US trade credit. With its perfect credit guarantee system, American Express helps China suppliers get the golden key to open the international market.