Customs clearance is customs clearance, customs clearance Bank clearance means that when banks conduct international trade, cross-border payment or foreign exchange transactions, they need to submit relevant information to the customs or relevant regulatory agencies to prove that the transactions comply with relevant laws, regulations and provisions, and at the same time ensure national security and financial security. The purpose of bank customs clearance is to ensure the safety and standardization of international trade, prevent illegal capital flow and malicious behavior, and promote the convenience and development of international trade.