Scene problems: I used thinkpad office, not on the network connection, wifi and cable are not connected to the boot, borrowed a colleague's cable too, so the judge is a problem with my computer
Solution: 1, win + R 2, cmd (run as administrator) 3, enter: netsh winsock reset 4, restart the computer
done
Detailed explanation Reference: https://blog.csdn.net/gongxifacai_believe/article/details/54933754