PING dz-www.shanghaicaidi.com (104.21.86.148) 56(84) bytes of data.
64 bytes from 104.21.86.148 (104.21.86.148): icmp_seq=1 ttl=60 time=6.73 ms
64 bytes from 104.21.86.148 (104.21.86.148): icmp_seq=2 ttl=60 time=4.14 ms
64 bytes from 104.21.86.148 (104.21.86.148): icmp_seq=3 ttl=60 time=4.12 ms

--- dz-www.shanghaicaidi.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.126/5.004/6.739/1.226 ms