If the credit card expires, the bank will contact you in advance to issue you a new card, and then your bill will be transferred to the new card in advance, so the landlord doesn't have to worry about the credit card being overdue because the card expires. If the landlord is still not at ease, he can repay in advance, which can avoid subsequent problems. In addition, the old card can be used normally before it expires. Generally speaking, the account number of the new card and the old card is the same account number, which is the information I learned. I wonder if the landlord understands my answer.