If the poster wants to apply for a limit increase, he must first ensure that there is no overdue record during the use period, and at the same time, the credit card must be used for more than half a year, so that the application for a permanent limit increase has a chance of success. In addition, the poster is applying In the three months before the limit increase, you need to use your credit card to spend as much as possible to earn points. It's best to use up your credit card limit. In this way, the bank will think that you really have relatively high spending power, and you will also need to submit supplementary documents. The above is the information I have learned. I hope my answer can help the original poster!