Take the credit card of China Merchants Bank as an example. The validity period of the credit card is 5 years, which is displayed under the 16 digit card number of the credit card. Some cards only show the expiration time, while others show the card issuance &; Expiration interval. If the number below the card number is an interval, such as 02/ 10-02/ 15, it means that the card was issued in February 20 10, and will expire at the end of February 20 15; If the number below the card number only says 02/ 15, it means that it will expire at the end of February.