PING www.yuqun.net (104.21.0.116) 56(84) bytes of data.
64 bytes from 104.21.0.116 (104.21.0.116): icmp_seq=1 ttl=60 time=4.47 ms
64 bytes from 104.21.0.116 (104.21.0.116): icmp_seq=2 ttl=60 time=4.55 ms
64 bytes from 104.21.0.116 (104.21.0.116): icmp_seq=3 ttl=60 time=4.68 ms

--- www.yuqun.net ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 4.477/4.570/4.680/0.114 ms