1. First, determine whether your credit card supports 30% off settlement. You can call the bank customer service or check the official credit card website.

2. If supported, you need to actively contact the bank to apply for settlement within a specified time, usually within one week after the bill date. The bank will calculate the balance based on the credit card bill and inform you of the amount that needs to be paid.

3. After the final payment is made in full, the bank will handle the settlement procedures within a certain period of time and return the discount amount to the credit card account.