After spending money with U.S. dollars on a CCB credit card, if you want to make foreign exchange purchases and repay on the credit card when you come back. Then the exchange rate for this foreign exchange purchase refers to the spot foreign exchange selling price of CCB's spot foreign exchange settlement and sales price. However, the exchange rate for foreign exchange purchases by credit cards is not updated in real time, but is updated every working day around 10 a.m., so if you purchase foreign exchange today, it will be converted according to the spot foreign exchange selling price at 10 a.m. today. Saturdays and Sundays are calculated based on the exchange rate updated on Friday. If you are using someone else's credit card, you can also ask the card owner to purchase foreign exchange first. After completion, the exchange rate will be displayed in the detailed description of the credit card.