PING www.gdweitian.cn (156.252.154.99) 56(84) bytes of data.
64 bytes from 156.252.154.99 (156.252.154.99): icmp_seq=1 ttl=121 time=155 ms
64 bytes from 156.252.154.99 (156.252.154.99): icmp_seq=2 ttl=121 time=154 ms
64 bytes from 156.252.154.99 (156.252.154.99): icmp_seq=3 ttl=121 time=155 ms

--- www.gdweitian.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 154.989/155.176/155.538/0.256 ms