2. Grasp the best time to swipe the card: the credit card has a billing date, and you can enjoy an interest-free period of at least 50 days on the first day after the billing date, and you can enjoy an interest-free period of 25 days on the same day.
3. Repayment: prepayment is required. If the time limit is exceeded, the bank will charge overdraft interest and late fees. Don't repay with the minimum repayment amount.
4. Don't let deposits overflow: Most banks will charge extra for excess deposits.
5. Free of annual fee: if you swipe your credit card more than the specified number of times, you are free of annual fee.
6. Redemption of points: the bank calculates points according to the amount of customers' consumption, and consumers can get points by swiping their cards.
7. Rational staging: Understand the extra costs incurred by staging.
8. Don't cash out illegally.