Found a large circle found the solution straightforward, in fact, hosts of the problem
Solution, open the path C: \ Windows \ System32 \ drivers \ hosts file in the etc
# GitHub Start 192.30.253.112 github.com 192.30.253.119 gist.github.com 151.101.184.133 assets-cdn.github.com 151.101.184.133 raw.githubusercontent.com 151.101.184.133 gist.githubusercontent.com 151.101.184.133 cloud.githubusercontent.com 151.101.184.133 camo.githubusercontent.com 151.101.184.133 avatars0.githubusercontent.com 151.101.184.133 avatars1.githubusercontent.com 151.101.184.133 avatars2.githubusercontent.com 151.101.184.133 avatars3.githubusercontent.com 151.101.184.133 avatars4.githubusercontent.com 151.101.184.133 avatars5.githubusercontent.com 151.101.184.133 avatars6.githubusercontent.com 151.101.184.133 avatars7.githubusercontent.com 151.101.184.133 avatars8.githubusercontent.com
This amendment hosts file, refresh the github page, you find the problem has been resolved.