How to unbind Yuxi Gaoguguan website with mobile phone?

In my account security-phone number, then there will be related options to cancel the phone number, just click.

However, some softwares need to verify the bound phone number when unbinding the bound phone number, which means that the unbinding number is needed when unbinding, so once the phone number is changed, unbind all unbinding softwares first, which will not cause more trouble.