PING www.ptdayu.com (156.234.30.163) 56(84) bytes of data.
64 bytes from 156.234.30.163 (156.234.30.163): icmp_seq=1 ttl=58 time=279 ms
64 bytes from 156.234.30.163 (156.234.30.163): icmp_seq=2 ttl=58 time=278 ms
64 bytes from 156.234.30.163 (156.234.30.163): icmp_seq=3 ttl=58 time=278 ms

--- www.ptdayu.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 278.484/278.696/279.039/0.656 ms