The bank card verification code required for Ctrip online ticket booking is the last three digits of the 7-digit signature on the back of the credit card.

Note:

The last three digits of the 7-digit signature on the back of the credit card are security codes, which are used when paying online.

The last three digits in the signature line on the back of the credit card are the CVV2 code. CVV2 is a verification code, which is used when bank cards are used for indirect card consumption situations, such as online payments, 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.