PING www.duorui.com.cn (154.85.60.150) 56(84) bytes of data.
64 bytes from 154.85.60.150 (154.85.60.150): icmp_seq=1 ttl=55 time=244 ms
64 bytes from 154.85.60.150 (154.85.60.150): icmp_seq=2 ttl=55 time=242 ms
64 bytes from 154.85.60.150 (154.85.60.150): icmp_seq=3 ttl=55 time=242 ms

--- www.duorui.com.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 242.214/243.052/244.557/1.066 ms