PING www.yankai.com.cn (139.129.175.133) 56(84) bytes of data.
64 bytes from 139.129.175.133 (139.129.175.133): icmp_seq=1 ttl=43 time=254 ms
64 bytes from 139.129.175.133 (139.129.175.133): icmp_seq=2 ttl=43 time=254 ms
64 bytes from 139.129.175.133 (139.129.175.133): icmp_seq=3 ttl=43 time=254 ms

--- www.yankai.com.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 254.228/254.409/254.764/0.251 ms