1. Open Alipay: Make sure the Alipay application is installed and there is an account.

2. Enter "My": In the navigation bar at the bottom of Alipay homepage, click "My".

3. Open "Bank Card": On the "My" page, find and click "Bank Card".

4. Select the virtual credit card to unbind: On the bank card page, find and click the virtual credit card to unbind.

5. Unbinding: On the bank card details page, click the "Settings" button in the upper right corner. Select Unbind or Unbind from the pop-up menu.

6. Confirm Unbinding: In the pop-up prompt box, confirm the unbinding operation. After unbinding, the virtual credit card will no longer be associated with your Alipay account.

Please note that if you can't find a virtual credit card in Alipay, it may be because Alipay has stopped the virtual credit card service. In this case, you may need to contact Alipay customer service for more details.

In addition, if you need to unbind a physical credit card, the operation process is similar. Just find and click the physical credit card you want to unbind on the "Bank Card" page, and then follow the prompts.