If the computer is a cool dog, manually enter the proxy server in the Cool Dog Settings option, search for "the latest China ip address proxy server" with Baidu, and then select a useful proxy ip and port to input into the Cool Dog Settings. I used IP 39. 137.69. 10 and then port 8080. These two data are different according to different time periods every day. If it doesn't work, I will go to cn-proxy.com to check the latest information.

The mobile phone settings are basically the same, except that the proxy server is set in the linked WiFi. Click the properties of WiFi, and then manually enter the same ip address and port in the HTTP proxy. After that, you can turn on the cool dog or other software of your mobile phone normally!

The above personal tests are valid.