PING ip-www.rchengxi.com (104.21.18.113) 56(84) bytes of data.
64 bytes from 104.21.18.113 (104.21.18.113): icmp_seq=1 ttl=60 time=4.72 ms
64 bytes from 104.21.18.113 (104.21.18.113): icmp_seq=2 ttl=60 time=4.91 ms
64 bytes from 104.21.18.113 (104.21.18.113): icmp_seq=3 ttl=60 time=4.53 ms

--- ip-www.rchengxi.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 4.531/4.722/4.911/0.155 ms