PING polex.com.cn (156.224.199.217) 56(84) bytes of data.
64 bytes from 156.224.199.217 (156.224.199.217): icmp_seq=1 ttl=121 time=145 ms
64 bytes from 156.224.199.217 (156.224.199.217): icmp_seq=2 ttl=121 time=143 ms
64 bytes from 156.224.199.217 (156.224.199.217): icmp_seq=3 ttl=121 time=142 ms

--- polex.com.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 142.883/143.950/145.933/1.469 ms