Hello, if it is a China Merchants Bank credit card, CVV2 is the verification code, which is used when the bank card is used for indirect card consumption, such as online payment, etc. Generally refers to the last three digits of the seven-digit number on the signature line on the back of your credit card. For example: 1234

567, just enter 567. The verification code will also change every time you change your credit card. If it is blurry, you can cover it with white paper and draw repeatedly to reveal the three digits. If you make multiple input errors and are locked, it will be restored the next day. This verification code can only be viewed on the customer's own card.