The first is the connection or driver problem, such as whether the network is normal, whether the router is normal, and whether the laptop's network card driver is normal.
There are many solutions on Baidu on how to check or how to solve the above. I only describe the problem that I have done overnight. It is a very sad experience. The notebook is located in the front section of the keyboard and has a wireless network switch, that is, the side of the notebook parallel to the desktop facing you.
I checked Baidu all night, and all the problems occurred in the first line. In fact, the first line was fine.