PING ck641.51.com (152.136.248.78) 56(84) bytes of data.
64 bytes from 152.136.248.78 (152.136.248.78): icmp_seq=1 ttl=54 time=263 ms
64 bytes from 152.136.248.78 (152.136.248.78): icmp_seq=2 ttl=54 time=260 ms
64 bytes from 152.136.248.78 (152.136.248.78): icmp_seq=3 ttl=54 time=260 ms

--- ck641.51.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 260.778/261.542/263.042/1.139 ms