For credit card non-cash transactions, the interest-free repayment period is from the bank bookkeeping date to the due repayment date. During this period, you don't need to pay any interest on non-cash transactions, provided that you pay off the current payable amount (total amount owed) on the current statement in full (you don't enjoy the interest-free discount on cash advance).
It is assumed that the arrival date of the cardholder's bank is 10 every month. Swipe your card once on May 9, and you must pay back the money within 20 or 25 days after May 10 (20 or 25 days depends on different banks, such as Bank of Communications, China Construction Bank and China CITIC Bank, the longest is 50 days).
If the cardholder swipes the card in May 1 1, how much money did you swipe from May 10 to June 10? Counting from June 10, the money will be returned within 20 or 25 days after June 10.