First, it is necessary for banks to implement the "three principles of exhibition industry" when handling foreign exchange settlement and sale business. (1) "Know your customers, know your business and conduct due diligence" is the existing "rule" of international banking. It is an inevitable trend for banks to follow the principle of exhibition industry in foreign exchange business. The "three principles of banking" are not the requirements of foreign exchange bureaus for banks, but the basic requirements of banking. There is a relatively complete banking legal system in the world. The application of the three principles of banks does not stay on the surface of the principles, but gives them many specific contents and clear requirements from the perspectives of relevant definitions, implementation, assessment measures, internal control of banks and external law enforcement. , more and more widely used in prudent risk management. Therefore, the three principles of exhibition industry are the existing international practice of international banking, and the foreign exchange bureau only introduces them into the operation and management of foreign exchange business of banks and emphasizes them. (2) The previous behavior supervision can no longer meet the needs of the current foreign-related economic development, and implementing the convention and exhibition principle is the inherent requirement of promoting the "five changes" and decentralization. With the continuous evolution of the international economic and financial situation, the complexity and freedom of foreign exchange business of banks have been greatly improved. In the past, the foreign exchange bureau put forward clear and specific requirements, and the supervision mode of banks acting according to the rules could not fully meet the requirements of the situation. For this reason, SAFE has continuously simplified administration and decentralized power, and accelerated the "five transformations". Among them, the three principles of exhibition industry are a useful attempt of principled supervision in the field of foreign exchange management, which helps banks to guard against their own operational risks and systematic regional financial risks. Being able to adapt to the new management requirements of SAFE to reduce or cancel the pre-approval of foreign exchange business as soon as possible and strengthen the supervision after the event is an inevitable requirement for promoting the decentralization of foreign exchange management and the reform of key areas.