Credit cards have a certain period of validity. If users want to use it normally, they should replace it in time. It is best to ask the bank to replace the new card one month before the expiration. The bank will issue a new card, and all your credit card amount, points, arrears and other information will be given to the new card, and the old card can be destroyed by itself. When a credit card is replaced when it expires, the card number is generally unchanged.