Foreign currency cash refers to monetary cash expressed in convertible currency. It should be noted that not all foreign currency cash is foreign exchange, only currency cash that can be freely converted into other foreign currencies in the international market is foreign exchange.
In international economic transactions, foreign currency cash as a means of payment is usually used for non-trade transactions. At present, the commonly used foreign currency cash in the world mainly includes US dollar, Japanese yen, British pound, German mark, Swiss franc, Hong Kong dollar, French franc, Australian dollar, Italian lira, Dutch guilder, Singapore dollar, Swedish kronor, Canadian dollar, Norwegian kronor and Belgian franc.