The interest-free period of China Merchants Bank Credit Card is 20-50 days. Please refer to the following details for the specific algorithm: \x0d\ "interest-free repayment period \" is not the absolute value of the credit card consumption date plus 50 days, but is calculated according to the number of days between the consumption date and the billing date, and the interest-free period will change between 20 and 50 days. \x0d\ How to swipe the credit card of China Merchants Bank 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. \x0d\ But if you paid 1000 yuan on February 6th, it will appear on the bill on February 7th at 65438, and you must pay it back on February 25th at the latest. If you pay 65438 yuan +0 days in advance, the interest-free period is only 20 days. \x0d\ If you swipe your card on or after the billing date, the interest-free period of the credit card is correspondingly longest.