PING www.chinatvc.cn--www.chinatvc.cn--www.chinatvc.cn (104.21.80.1) 56(84) bytes of data.
64 bytes from 104.21.80.1 (104.21.80.1): icmp_seq=1 ttl=60 time=6.88 ms
64 bytes from 104.21.80.1 (104.21.80.1): icmp_seq=2 ttl=60 time=4.07 ms
64 bytes from 104.21.80.1 (104.21.80.1): icmp_seq=3 ttl=60 time=4.11 ms

--- www.chinatvc.cn--www.chinatvc.cn--www.chinatvc.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 4.072/5.022/6.884/1.318 ms