Credit card flash payment can be closed through mobile banking, and the operation method is as follows:

1. Take China Construction Bank as an example, open the China Construction Bank app and click the place indicated by the arrow in the upper right corner.

2. Next, click Security Center.

3. After entering the Security Center page, click Quick Payment Management.

4. After entering the fast payment management page, click on the credit card to turn off the flash payment function.

5. Next, click Stop Authorization at the bottom of the page.