The security verification code is on the signature bar on the back of the credit card. The first four digits of the seven-digit number are the mantissa of the card number, and the last three digits are used as security authentication. It is mainly used for telephone transactions of real-name registration system goods such as air tickets and hotels, or online shopping as a security verification means to assist transactions. In order to avoid unnecessary risks and losses caused by information leakage, please take good care of the card and your personal information.

The above contents are for your reference. Please refer to the actual business regulations.

If in doubt, please consult the online customer service of China Bank or download and use the mobile banking APP of China Bank to handle related business.