All transaction funds of the secondary card and corresponding interest and expenses are credited to the account of the primary card, and the cardholder of the primary card bears all repayment responsibilities; The main cardholder and the supplementary cardholder with full capacity for civil conduct shall be jointly and severally liable for the debts owed to the bank, while the supplementary cardholder with limited capacity for civil conduct shall only be liable for the debts incurred by the supplementary card held by him.
Personal card holders of bank credit cards can download the application form online or pick it up at outlets. Fill in the field information of the main card number and the supplementary card, and the cardholder of the main card and the supplementary card sign the signature fields of the main card and the supplementary card respectively. Attach a copy of the cardholder's ID card, and then submit the application form and related materials at the bank outlet.