1. Banks have age restrictions for primary credit card applicants, and they also have age restrictions for secondary cardholders, and each bank has different age restrictions. People who are 13 years old for Minsheng Credit Card and China Construction Bank Credit Card can apply for supplementary cards; those who are 14 years old for China Merchants Bank Credit Card and Agricultural Bank of China Credit Cards; most bank credit cards are only issued to applicants who are over 16 years old; for compatriots from Hong Kong, Macao and Taiwan or overseas people More demanding.

2. The procedure for applying for an additional credit card will be much easier than applying for a primary card. If the primary cardholder plans to apply for an additional card when applying for a credit card, he or she only needs to check the box for applying for an additional card and fill in the form. The relevant information of the supplementary cardholder and the supplementary credit card will be sent together with the main card.

3. If you apply for a supplementary card after the credit card application is successful, the main cardholder needs to go to the bank branch to get it or download the application form from the bank's official website, and include the main card information in the application form. Fill in the card number and supplementary card column information, and the main cardholder and supplementary cardholder will sign their names respectively. In addition, the supplementary cardholder needs to provide a copy of his or her ID card and submit it to the bank staff together with the application form.

4. Applying for a supplementary credit card can effectively manage family finances. The main cardholder can grasp the consumption information of the supplementary cardholder in a timely manner. The repayment of the supplementary card can also be made by the principal cardholder. In this way It also saves the additional costs incurred by family fund conversion.