PING liushua.com (104.21.86.76) 56(84) bytes of data.
64 bytes from 104.21.86.76 (104.21.86.76): icmp_seq=1 ttl=60 time=4.69 ms
64 bytes from 104.21.86.76 (104.21.86.76): icmp_seq=2 ttl=60 time=4.00 ms
64 bytes from 104.21.86.76 (104.21.86.76): icmp_seq=3 ttl=60 time=4.08 ms

--- liushua.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.008/4.262/4.695/0.316 ms