1. Log in to mobile banking or online banking of Postal Savings Bank, find options such as "payment management" or "transfer and remittance" on the bank card page, and click Enter.

2. On the payment management page or transfer remittance page, find "Bank Card Limit Management" or similar options, and click Enter.

3. On the bank card limit management page or similar pages, users can see the current bank card limit, and if they need to cancel the limit, they just need to click "Cancel Limit" or similar options.