PING underground-www.mac.net.cn (123.56.134.134) 56(84) bytes of data.
64 bytes from 123.56.134.134 (123.56.134.134): icmp_seq=1 ttl=51 time=266 ms
64 bytes from 123.56.134.134 (123.56.134.134): icmp_seq=2 ttl=51 time=266 ms
64 bytes from 123.56.134.134 (123.56.134.134): icmp_seq=3 ttl=51 time=266 ms

--- underground-www.mac.net.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 266.303/266.419/266.613/0.443 ms