PING underground-www.mac.net.cn (162.159.211.37) 56(84) bytes of data.
64 bytes from 162.159.211.37 (162.159.211.37): icmp_seq=1 ttl=54 time=4.79 ms
64 bytes from 162.159.211.37 (162.159.211.37): icmp_seq=2 ttl=54 time=4.87 ms
64 bytes from 162.159.211.37 (162.159.211.37): icmp_seq=3 ttl=54 time=4.98 ms

--- underground-www.mac.net.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 4.797/4.884/4.980/0.110 ms