Foreign currency is the abbreviation of "foreign currency", which refers to the currency of other countries or regions other than domestic currency. It is often used for foreign settlement business caused by trade, investment and other economic activities. Foreign currency refers to another currency used in the official currency area or a payment request made in another currency.
Different currencies have different exchange ranges.
A freely convertible foreign currency can be freely converted into other currencies without restriction.
Limited convertible foreign currencies can only be exchanged under certain conditions, such as only a certain number of people can exchange them, or the amount of exchange is limited.
Non-convertible foreign currencies are not allowed to be converted into other currencies, or can only be converted into other currencies through special permission.