QQ and wechat are two different chat software. If there is no binding between them, then the newly registered QQ number can't log in to wechat. Can't the new QQ number be bound to wechat? So what if the newly registered QQ can't log in to wechat? Let's have a look.
Methods / steps:
Open the existing wechat and click 'I'.
On my page, click settings.
On the settings page, click account and security.
On the account and Security page, click more security settings.
In the 'more security settings' page, select QQ number and click in.
Add QQ number, click finish, you can complete the binding, then use QQ number, you can realize wechat login.
If you don't have a wechat to bind, you can apply for another one with your mobile phone number, and then do the above binding work.