PING underground-www.pumingsh.icoc.cc (172.67.159.193) 56(84) bytes of data.
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=1 ttl=60 time=4.88 ms
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=2 ttl=60 time=4.56 ms
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=3 ttl=60 time=4.39 ms

--- underground-www.pumingsh.icoc.cc ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1999ms
rtt min/avg/max/mdev = 4.395/4.612/4.881/0.209 ms