Precautions for credit card number selection: 1. Only partial customization: Most credit card numbers in China are 16 digits, but only the last 6 digits can be customized, and the first 12 digits are selected by the system according to the rules. 2. Need to charge a subscription fee: We have to pay for choosing a beautiful phone number, and so does the custom card number of a credit card. The fee varies from bank to bank. For example, Pufa Credit Card usually charges 5 yuan to 4, yuan per card, and there will be a price prompt on the application page. 3. Repayment is required on time: the customized card number is only available to the main cardholder of the existing credit card. After the customized card number is activated or not, the subscription fee will be deducted from the credit card account and included in the next bill, and repayment is required on time. 4. Card number change after customization: After customizing the card number of a credit card, the customized card number will be retained in case of card replacement due to credit card expiration or damage. In case of loss reporting and card replacement, a new card needs to be reissued. The customized card number will not be retained, and the number will be randomly selected by the system, and the deducted customization fee will not be refunded.