1. The exchange rate of cash is also called the buying and selling price of cash. Refers to the exchange rate used by banks to buy or sell foreign currency cash. Spot exchange rate is divided into buying exchange rate and selling exchange rate.

2.ByyingRate, also known as foreign exchange buying price, refers to the exchange rate used by banks to buy foreign exchange from customers. Generally speaking, the exchange rate at which foreign currency is converted into local currency is the buying exchange rate, which indicates how much local currency is needed to buy a certain amount of foreign currency.

3.sellingRate, also known as foreign exchange selling price, refers to the exchange rate used by banks to sell foreign exchange to customers. The benchmark exchange rate of RMB is the benchmark exchange rate of major trading currencies (US dollars, Japanese yen and Hong Kong dollars) against RMB announced by the People's Bank of China according to the weighted average price of US dollars against RMB formed in the inter-bank foreign exchange market the previous day, that is, the market transaction middle price.

4. When converting foreign currency into RMB, you should refer to the buying price of cash (equivalent to bank buying). There are many complicated factors that affect the exchange rate, so we should pay attention to it: for example, we can analyze the current situation of its economic development by using the economic data such as employment, price and production published by a country or region, so as to judge the relevant currency exchange rate and interest rate trends.

I hope it helps you.