The reason why CCB cannot bind WeChat is that the reserved mobile phone number does not match the entered mobile phone number. In order to solve this problem, users should first check whether the entered mobile phone number is correct. If there is no mistake, you can contact China Construction Bank to change the reserved number. After the change is completed, it is necessary to unbind the previously bound bank card in the WeChat wallet and re-verify the newly set reserved number to successfully complete the association operation between CCB and WeChat account.