PING liailin.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=4.88 ms
64 bytes from 104.21.67.90 (104.21.67.90): icmp_seq=2 ttl=60 time=4.67 ms
64 bytes from 104.21.67.90 (104.21.67.90): icmp_seq=3 ttl=60 time=4.76 ms

--- liailin.dz.vancelle.net ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2004ms
rtt min/avg/max/mdev = 4.670/4.774/4.888/0.089 ms