PING www.xie18.cn (104.21.13.41) 56(84) bytes of data.
64 bytes from 104.21.13.41 (104.21.13.41): icmp_seq=1 ttl=60 time=5.72 ms
64 bytes from 104.21.13.41 (104.21.13.41): icmp_seq=2 ttl=60 time=3.99 ms
64 bytes from 104.21.13.41 (104.21.13.41): icmp_seq=3 ttl=60 time=4.09 ms

--- www.xie18.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 3.991/4.602/5.726/0.799 ms