PING underground-www.fpdk66566.icoc.cc (104.21.9.108) 56(84) bytes of data.
64 bytes from 104.21.9.108 (104.21.9.108): icmp_seq=1 ttl=59 time=5.49 ms
64 bytes from 104.21.9.108 (104.21.9.108): icmp_seq=2 ttl=59 time=5.17 ms
64 bytes from 104.21.9.108 (104.21.9.108): icmp_seq=3 ttl=59 time=5.03 ms

--- underground-www.fpdk66566.icoc.cc ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 5.031/5.232/5.491/0.192 ms