No. Since American restaurants can use your CCB credit card to pay for meals, it means that your card can be used in the United States. Since it can be used, of course you can also receive a refund. The credit card itself has the function of international payment. The principles of overseas use and refund are the same as those within the country. As for the refund in RMB or US dollars, it depends on the card organization route you took when paying. If it is a UnionPay or a credit card with global payment function, the refunded $40 will be automatically converted into RMB and credited to your account. If you take the wild card route, you will get a direct refund of $40. Overseas refunds take longer to arrive in your account. You can check your credit card account every 3 days or so (to see if there are any outstanding bills) to see if there is any refund record.