PING www.qcxn.cn (104.21.79.103) 56(84) bytes of data.
64 bytes from 104.21.79.103 (104.21.79.103): icmp_seq=1 ttl=60 time=4.44 ms
64 bytes from 104.21.79.103 (104.21.79.103): icmp_seq=2 ttl=60 time=4.58 ms
64 bytes from 104.21.79.103 (104.21.79.103): icmp_seq=3 ttl=60 time=4.43 ms

--- www.qcxn.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.432/4.486/4.587/0.105 ms