1. Spend as much as possible: After the credit card is completed, spend as much as possible. The more frequently used, the higher the loyalty of credit card users to banks. But the frequency should not be too high.

2. Try to use up the credit card limit: it is best to use up the limit given by the bank every month, spend a lot of money irregularly, and then repay normally. These cardholders are usually defined as high-quality customers, and banks will increase the limit as appropriate after judging whether cardholders have large demand.