PING pro-oversea.site.cdncenter.cn (8.209.71.122) 56(84) bytes of data.
64 bytes from 8.209.71.122 (8.209.71.122): icmp_seq=1 ttl=57 time=10.7 ms
64 bytes from 8.209.71.122 (8.209.71.122): icmp_seq=2 ttl=57 time=10.0 ms
64 bytes from 8.209.71.122 (8.209.71.122): icmp_seq=3 ttl=57 time=9.97 ms

--- pro-oversea.site.cdncenter.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 9.977/10.273/10.744/0.346 ms