Yes, I also have two ICBC credit cards. I have also opened a secondary card, but not the main card. I have consulted ICBC customer service and it will not be affected. You still need to enter the card number of the secondary card for repayment.

The functions of the secondary card of the credit card are the same as those of the main card. It can withdraw cash and make purchases, and it also charges an annual fee.

Generally speaking, the annual fee for the supplementary card is 50 yuan for the main card. For example, if the annual fee for the main card of Shanghai Pudong Development Bank's ordinary credit card is 180 yuan, then the annual fee for the supplementary card for this credit card is 90 yuan.

The annual fee exemption policy for the supplementary card is the same as that for the main card. For example, a certain bank’s credit card requires consumption 6 times a year to be exempted from the annual fee for the next year. If you have the main credit card of this bank, If the card also holds a supplementary card, and if the main card does not make more than 6 purchases per year, in addition to the main card annual fee of 180 yuan, you will also have to pay an annual fee of 90 yuan for the supplementary card.

Extended information:

Once you hold a primary and secondary credit card, you must first ensure that the primary card consumption meets the annual fee-free conditions, otherwise the gain will outweigh the loss.

Supplementary credit cards can generally only be opened for the parents, children, and spouse of the primary cardholder.

Only the principal cardholder is required to fill in the application materials for the supplementary card, sign in person and hand them over to the bank's service staff for processing.

The main credit card and the supplementary card limit are exclusive, and the supplementary card also needs to charge an annual fee, usually 50 for the main card. The specific annual fee exemption rules are the same as those for the main card.

But the advantage of the secondary card is that the secondary card can also help the main card earn points together.

Baidu Encyclopedia - Bank Card