After the official information query as of December 2, 2022, the QR code on the surveillance is so that the phone can be matched to connect the way to change the phone can be scanned in from new to match, so it is not disposable.
The camera is also known as a computer camera, computer eye, electronic eye, etc. It is a video input device, is widely used in video conferencing, telemedicine and real-time monitoring, etc. Ordinary people can also each other through the camera in the network with images, sound conversation and communication.