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The purpose of 7 digits on the back of China Bank credit card.
The last three digits of the signature column on the back of the card are the auxiliary transaction security verification methods of telephone transaction or online payment. In order to avoid unnecessary risks and losses caused by password disclosure, 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.