PING www.liemoren.com.cn (104.21.55.239) 56(84) bytes of data.
64 bytes from 104.21.55.239 (104.21.55.239): icmp_seq=1 ttl=60 time=4.14 ms
64 bytes from 104.21.55.239 (104.21.55.239): icmp_seq=2 ttl=60 time=4.27 ms
64 bytes from 104.21.55.239 (104.21.55.239): icmp_seq=3 ttl=60 time=4.30 ms

--- www.liemoren.com.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.143/4.242/4.306/0.071 ms