PING www.yi-s.com (104.21.16.1) 56(84) bytes of data.
64 bytes from 104.21.16.1 (104.21.16.1): icmp_seq=1 ttl=60 time=7.08 ms
64 bytes from 104.21.16.1 (104.21.16.1): icmp_seq=2 ttl=60 time=4.34 ms
64 bytes from 104.21.16.1 (104.21.16.1): icmp_seq=3 ttl=60 time=4.25 ms

--- www.yi-s.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 4.258/5.228/7.082/1.312 ms