It usually takes 15-30 working days to apply for an additional credit card to be approved. Sometimes it takes longer, so it is recommended to call the bank's customer service to inquire about the progress of the process.

Each main credit card can apply for up to two supplementary cards, and the main cardholder has the right to request the cancellation of its supplementary cards. The credit limit of the supplementary card is designated by the principal cardholder on the premise that it does not exceed the credit limit of the corresponding principal card; if the principal cardholder does not specify it, the credit limit of the supplementary card is the same as that of the principal card.

All transaction amounts and corresponding interest and fees of the supplementary card will be charged to the main card account, and the main cardholder shall bear all repayment responsibilities. However, the principal cardholder and the supplementary cardholder are jointly and severally liable to each other for repaying the amounts owed.