PING yuefei.net (139.224.112.6) 56(84) bytes of data.
64 bytes from 139.224.112.6 (139.224.112.6): icmp_seq=1 ttl=50 time=317 ms
64 bytes from 139.224.112.6 (139.224.112.6): icmp_seq=2 ttl=50 time=322 ms
64 bytes from 139.224.112.6 (139.224.112.6): icmp_seq=3 ttl=50 time=313 ms

--- yuefei.net ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 313.658/317.710/322.078/3.505 ms