1. Repay on time. Timely repayment is a point that banks attach great importance to, which can improve the bank's trust in cardholders.

2. Keep the frequency of using credit cards. Keep the credit card used every month, and it is best to count the card between 10-20 times a month.

3. Appropriate use of credit card installment or cash withdrawal business. Make the bank profitable and make you more popular with the bank.

4. Increase the amount at an appropriate time. Ordinary bank credit cards can increase the temporary limit once a month, while the increase of the fixed limit of credit cards usually requires an application every other month.

5. Don't cash out. It is illegal to cash out, and the card may be blocked if it is found by the bank.