PING www.b21691.cn (38.38.93.211) 56(84) bytes of data.
64 bytes from 38.38.93.211 (38.38.93.211): icmp_seq=1 ttl=122 time=158 ms
64 bytes from 38.38.93.211 (38.38.93.211): icmp_seq=2 ttl=122 time=155 ms
64 bytes from 38.38.93.211 (38.38.93.211): icmp_seq=3 ttl=122 time=155 ms

--- www.b21691.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 155.019/156.292/158.725/1.750 ms