1, the exchange rates of major banks are on the websites of banks. As for whether it is cost-effective, you can check it yourself.

2. The foreign exchange rate of China Bank is as follows:

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You can change it at the weekend.

4. Take today's quotation as an example. You can buy 788.6 1 RMB from China Bank for 100 USD.

Cash purchase: refers to the exchange rate used by banks to buy foreign currency cash.

Cash purchase: that is, selling customers' foreign exchange deposits in foreign banks to banks. This foreign exchange deposit was transferred from the customer's name to the bank's name from the moment the customer sold it to the bank. As long as the bank does the corresponding accounting treatment, it can immediately get this foreign exchange deposit in a foreign bank and start calculating interest immediately.

The middle rate of foreign exchange, also called the intermediate exchange rate, is the average of the buying exchange rate and the selling exchange rate. Its calculation formula is: intermediate exchange rate = (buying exchange rate+selling exchange rate) ÷2.

The selling price of foreign exchange is also called the selling exchange rate. The price at which banks sell foreign exchange corresponds to the buying price of foreign exchange.