PING mail.chem-tech.com.cn (58.221.226.166) 56(84) bytes of data.
64 bytes from mail.ch-pm.com.cn (58.221.226.166): icmp_seq=1 ttl=54 time=266 ms
64 bytes from mail.ch-pm.com.cn (58.221.226.166): icmp_seq=2 ttl=54 time=265 ms
64 bytes from mail.ch-pm.com.cn (58.221.226.166): icmp_seq=3 ttl=54 time=265 ms

--- mail.chem-tech.com.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2000ms
rtt min/avg/max/mdev = 265.477/265.727/266.134/0.290 ms