又挂了
└⋊> curl -I http://mirrors.tuna.tsinghua.edu.cn/elpa/gnu/
HTTP/1.1 200 OK
Server: nginx/1.12.2
Date: Mon, 12 Mar 2018 03:23:26 GMT
Content-Type: text/html; charset=utf-8
Connection: keep-alive
X-TUNA-MIRROR-ID: neomirrors
Strict-Transport-Security: max-age=31536000
└⋊> curl -I http://elpa.emacs-china.org/gnu/
curl: (7) Failed to connect to elpa.emacs-china.org port 80: Operation timed out