PING ip-www.shxueji.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=4.90 ms
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=2 ttl=60 time=4.63 ms
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=3 ttl=60 time=4.62 ms

--- ip-www.shxueji.icoc.cc ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 4.620/4.718/4.904/0.142 ms