1. If the user applies for the secondary card at the same time as the main card of the visa card, in this case, there is no need to provide additional application materials, and the user only needs to check the secondary card option in the application form;
2. If the user does not apply for the supplementary card at the same time, he can apply for the supplementary card at the counter of the offline business outlet of the issuing bank with the identity information of the supplementary card applicant after the main card of the visa card is issued.