"Interest-free repayment period" is not the absolute value of credit card consumption date plus 50 days, but is calculated according to the number of days between consumption date and billing date, and the interest-free period will change between 20-50 days.
How to swipe China Merchants Bank credit card with the longest interest-free period? If your billing date is the 7th and the repayment date is the 25th, then if you spend 1000 yuan on the billing date of February 7th, then your spending on February 7th will appear on the billing date of 17, and it will be repaid on the 25th of October at the latest, that is, 47.
But if you spend 1000 yuan on February 6, 65438, it will be on the bill on February 7+February 25, 65438 at the latest. If you spend 1 day in advance, the interest-free period is only 20 days.
Credit cards have the longest interest-free period when they are swiped on the day or a few days after the bill.