PING www.puair.com.cn (104.21.64.166) 56(84) bytes of data.
64 bytes from 104.21.64.166 (104.21.64.166): icmp_seq=1 ttl=60 time=6.14 ms
64 bytes from 104.21.64.166 (104.21.64.166): icmp_seq=2 ttl=60 time=4.14 ms
64 bytes from 104.21.64.166 (104.21.64.166): icmp_seq=3 ttl=60 time=4.10 ms

--- www.puair.com.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.103/4.799/6.147/0.953 ms