PING www.xdhkj.com.cn (104.21.112.1) 56(84) bytes of data.
64 bytes from 104.21.112.1 (104.21.112.1): icmp_seq=1 ttl=60 time=4.01 ms
64 bytes from 104.21.112.1 (104.21.112.1): icmp_seq=2 ttl=60 time=3.93 ms
64 bytes from 104.21.112.1 (104.21.112.1): icmp_seq=3 ttl=60 time=4.03 ms

--- www.xdhkj.com.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 3.936/3.996/4.036/0.067 ms