For example, the day before yesterday, 1 USD =6.3840 RMB; Today 1 USD =6.3860 RMB. In China, the US dollar is foreign exchange, and the US dollar exchange rate rises and the US dollar appreciates, that is, the foreign exchange rate rises and the foreign exchange appreciates; Similarly, the RMB exchange rate fell and the RMB depreciated.
The exchange rate of foreign exchange is a pair of currencies. There must be a currency exchange rate rising and a currency exchange rate falling.