The administrator password is set when entering the wireless router for the first time and is generally 6-15 digits. If the administrator password is forgotten, if you can access the Internet normally, and you do not have to enter the wireless router Settings page, then do not care about it.
If it is urgent to enter the wireless router Settings page, then restore the wireless router factory, and then enter the Settings page to set the administrator password. But in that case, you'll have to reset your wireless router.