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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=248 ms
64 bytes from 123.56.134.134 (123.56.134.134): icmp_seq=3 ttl=51 time=247 ms
--- underground-www.mac.net.cn ping statistics ---
3 packets transmitted, 2 received, 33% packet loss, time 2015ms
rtt min/avg/max/mdev = 247.921/248.117/248.313/0.196 ms
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