PING www.nanstudy.cn (61.147.105.15) 56(84) bytes of data.
64 bytes from 61.147.105.15 (61.147.105.15): icmp_seq=1 ttl=51 time=300 ms
64 bytes from 61.147.105.15 (61.147.105.15): icmp_seq=2 ttl=51 time=298 ms
64 bytes from 61.147.105.15 (61.147.105.15): icmp_seq=3 ttl=51 time=299 ms

--- www.nanstudy.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 298.945/299.410/300.282/0.617 ms