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=148 ms
64 bytes from 123.56.134.134 (123.56.134.134): icmp_seq=2 ttl=51 time=143 ms

--- underground-www.mac.net.cn ping statistics ---
3 packets transmitted, 2 received, 33% packet loss, time 2002ms
rtt min/avg/max/mdev = 143.248/145.712/148.176/2.464 ms