PING www.sf-yxj.com (156.234.11.143) 56(84) bytes of data.
64 bytes from 156.234.11.143 (156.234.11.143): icmp_seq=1 ttl=57 time=251 ms
64 bytes from 156.234.11.143 (156.234.11.143): icmp_seq=2 ttl=57 time=248 ms
64 bytes from 156.234.11.143 (156.234.11.143): icmp_seq=3 ttl=57 time=248 ms

--- www.sf-yxj.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 248.577/249.430/251.096/1.311 ms