Credit card refund can be inquired through credit card bill details. If the refund is booked before the bill is issued, it can offset the current bill. If the refund is booked after the bill is issued, it can be offset against the next bill before the bill is issued. (The entry time of the refund depends on the processing time of the merchant's acquiring bank, which is generally 15 working days, and the monthly repayment is still subject to the actual account situation. )