Increased the uncertainty of the foreign exchange market. Due to the continuous influence of COVID-19 epidemic at home and abroad and the change of international situation, the foreign exchange rate fluctuates frequently, which increases the uncertainty of the foreign exchange market. Foreign exchange, called Foreigncurrency in English, is a creditor's right held by monetary authorities (central bank, monetary management institution, foreign exchange stabilization fund and Ministry of Finance) in the form of bank deposits, treasury bonds and long-term and short-term government securities. Can be used when the balance of payments is in deficit.