PING www.wuxi-lutong.com (104.21.2.251) 56(84) bytes of data.
64 bytes from 104.21.2.251 (104.21.2.251): icmp_seq=1 ttl=59 time=5.47 ms
64 bytes from 104.21.2.251 (104.21.2.251): icmp_seq=2 ttl=59 time=5.07 ms
64 bytes from 104.21.2.251 (104.21.2.251): icmp_seq=3 ttl=59 time=5.06 ms

--- www.wuxi-lutong.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2004ms
rtt min/avg/max/mdev = 5.061/5.202/5.472/0.207 ms