The mcake card cannot be used after it expires. According to the query related information, there will be a time limit on the cake card. It is hoped that the user can use the cake card to buy cakes within the specified time. The time specified by the merchant has passed, and then use the expired cake card to buy cakes. , the merchant will not recognize it, and if the cake card expires, it will be invalidated directly. A discount card is a voucher issued to consumers by merchants, organizations, groups, etc. When consumers purchase goods or services, they can enjoy discounts, cash credits, points and other rights.