The first thing to note is that what you need to unbind is the bank card bound by WeChat official account, not the fast payment bound in WeChat wallet.

Open the bound official account of CITIC Bank Credit Card WeChat, and the following icon will appear.

Click to switch to the input interface.

Enter unbind,

Enter 0022 according to the prompt, and you will be prompted whether to unbind later. After confirmation, the unbinding was successful.