The interest-free period starts from the credit card date of each consumption and is counted as the repayment date. About 25 to 56 days.
Regardless of whether the card is swiped on 30th or 3rd1,ICBC will uniformly calculate the bill of the current month and return it next month. It is impossible to calculate the next order for you on the 30th. The "experts" upstairs may not be ICBC users, so it is not clear. Pay special attention to this and don't make a mistake.