PING pro-www.shzhongkao.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=59 time=5.79 ms
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=2 ttl=59 time=5.49 ms
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=3 ttl=59 time=5.40 ms

--- pro-www.shzhongkao.icoc.cc ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 5.401/5.562/5.791/0.166 ms