It is to promote the development of international economy and trade.

Paying off international creditor's rights and debts with foreign exchange can not only save the cost of transporting cash, reduce risks, shorten payment time and speed up capital turnover, but more importantly, it can expand international credit exchanges, broaden financing channels and promote trade development. Third, it is conducive to the international transfer of funds. Fourth, foreign exchange, as an international means of payment, can promote the balanced development of national economies through international credit investment.