PING www.chemistry.net.cn (47.108.176.179) 56(84) bytes of data.
64 bytes from 47.108.176.179 (47.108.176.179): icmp_seq=1 ttl=47 time=293 ms
64 bytes from 47.108.176.179 (47.108.176.179): icmp_seq=2 ttl=47 time=291 ms
64 bytes from 47.108.176.179 (47.108.176.179): icmp_seq=3 ttl=47 time=291 ms

--- www.chemistry.net.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 291.752/292.501/293.968/1.037 ms