Expansion: Foreign currency refers to the currency used and traded by people outside the common currency of another country. For example, in China, US dollars, euros and Japanese yen are all called foreign currencies. Common foreign exchange includes USD, EUR, GBP, JPY and HKD.

For cross-border trade or travel, it is necessary to exchange between different currencies. At this time, it is necessary to purchase a corresponding amount of target national currency through banks or other financial institutions to complete payment or settlement.

Due to the differences in economic development levels and policies of various countries, exchange rates fluctuate greatly.

The exchange rate of foreign currency will also change accordingly. Therefore, the foreign exchange market is a high-risk and high-return investment field, attracting a large number of institutions and individuals to conduct trading operations. At the same time, when domestic residents travel abroad or buy imported goods, they need to pay in the corresponding foreign currency. At this time, we need to pay attention to the exchange rate and handling fee between different currencies to avoid unnecessary losses.