1. Open Ping An Pocket Bank app and log in to the account.
2. On the home page or menu bar, find and click "Card Management" or similar options.
3. On the card management page, find the card that needs to be replaced, and click to enter the detailed page.
On the details page, you should be able to find some basic information about the card, including the card number.
5. Click the "Modify" button next to the card number or similar options.
6. According to the prompt of the app, enter the correct card number information and confirm it.
7. After confirmation, save the changes and exit the card management page.
It should be noted that the above steps are only applicable to the routine operation of Ping An Pocket Bank app. If you encounter problems in the specific operation process, it is recommended that you contact Ping An Bank's customer service or bank counter for consultation and handling.