PING jiankjianfan.net (104.21.31.184) 56(84) bytes of data.
64 bytes from 104.21.31.184 (104.21.31.184): icmp_seq=1 ttl=60 time=6.55 ms
64 bytes from 104.21.31.184 (104.21.31.184): icmp_seq=2 ttl=60 time=3.97 ms
64 bytes from 104.21.31.184 (104.21.31.184): icmp_seq=3 ttl=60 time=4.10 ms

--- jiankjianfan.net ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 3.974/4.876/6.551/1.187 ms