PING cai.lu (156.236.116.17) 56(84) bytes of data.
64 bytes from 156.236.116.17 (156.236.116.17): icmp_seq=2 ttl=58 time=257 ms

--- cai.lu ping statistics ---
3 packets transmitted, 1 received, 66% packet loss, time 2010ms
rtt min/avg/max/mdev = 257.918/257.918/257.918/0.000 ms