The repayment date of CCB's credit card is the 20th day after the billing date, while your credit card billing date is the 7th of each month (fixed), so the final repayment date is the 20th day after the billing date, that is, the 27th of each month.

May 8-June 7 is a billing cycle. This cycle of credit card consumption will generate a bill on June 7, and June 27 is the final repayment date. Full repayment before this date is interest-free.

June 8-July 7 is a billing cycle. This cycle of credit card consumption will generate a bill on July 7, and July 27 is the final repayment date. Full repayment before this date is interest-free. And so on.

Therefore, if the bill is swiped on the same day, the interest-free period is the shortest, only 20 days (swiping the card on June 7 and repaying it on June 27). If you swipe your card after the bill, the interest-free period is the longest, 50 days (swipe your card on June 8 and repay it on July 27). Be sure to know the billing date and repayment date of your credit card so as not to miss it.