Longka quasi-credit card can handle up to three supplementary cards, and users can handle the supplementary cards of Longka quasi-credit card through the following channels:

1. The main cardholder of Longka quasi-credit card and the applicant for supplementary cards can apply for supplementary cards at the counter of the nearby business outlets of China Construction Bank with a copy of the ID card of the supplementary cardholder and a copy of the relationship certification materials between the main cardholder and the supplementary cardholder;

2. Users can also go through the official credit card website of China Construction Bank.