PING liucaixia.dz.vancelle.net (104.21.67.90) 56(84) bytes of data.
64 bytes from 104.21.67.90 (104.21.67.90): icmp_seq=1 ttl=60 time=15.5 ms
64 bytes from 104.21.67.90 (104.21.67.90): icmp_seq=2 ttl=60 time=16.3 ms
64 bytes from 104.21.67.90 (104.21.67.90): icmp_seq=3 ttl=60 time=14.4 ms

--- liucaixia.dz.vancelle.net ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 14.409/15.463/16.396/0.828 ms