It is an embodiment of the control of the State Administration of Foreign Exchange on "advance payment" and "advance payment". Refers to the enterprises in foreign exchange receipts and payments, in the name of advance receipts or advance receipts without customs declaration documents, must operate within a certain amount. Once the quota is operated, SAFE thinks that its foreign exchange receipts and payments are abnormal and will not be able to operate.

This is also a control measure to control hot money and limit illegal foreign exchange receipts and payments. That is, enterprises cannot make foreign exchange payments at will and without restriction.