The short message sent by the rural credit cooperative said that a card has expired, so what does the rural credit cooperative mean by the card?

The expiration of a bank card means that the bank card has reached the stipulated validity period. If it is a savings card, it has no validity period, so long as it is not frozen or becomes a dormant card, it can be used indefinitely. Credit cards are usually valid for 3-5 years. You can see the expiration date on the credit card, and the date format is month/year. For example, 12/ 19 means that the validity period of the credit card is 20 19 12.