PING underground-www.tfftu.cn (140.188.167.75) 56(84) bytes of data.
64 bytes from 140.188.167.75 (140.188.167.75): icmp_seq=1 ttl=121 time=295 ms
64 bytes from 140.188.167.75 (140.188.167.75): icmp_seq=2 ttl=121 time=340 ms
64 bytes from 140.188.167.75 (140.188.167.75): icmp_seq=3 ttl=121 time=365 ms

--- underground-www.tfftu.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 295.471/333.969/365.941/29.140 ms