1. Use Du Yao Bank's credit card to do Haitao shopping and spending abroad. In this way, drug banks will take the initiative to increase the amount of cardholders.

2. Always use the credit card of Du Yao Bank. More than 80% of the consumption is made through the credit card of Du Yao Bank, which can increase the credit limit of the cardholder.

3. Paying back the money on time can also increase the credit card limit of Du Yao Bank.