PING g1-cn.ssl.cdncenter.cn (180.153.100.49) 56(84) bytes of data.
64 bytes from 180.153.100.49 (180.153.100.49): icmp_seq=1 ttl=54 time=259 ms
64 bytes from 180.153.100.49 (180.153.100.49): icmp_seq=2 ttl=54 time=255 ms
64 bytes from 180.153.100.49 (180.153.100.49): icmp_seq=3 ttl=54 time=255 ms

--- g1-cn.ssl.cdncenter.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 6266ms
rtt min/avg/max/mdev = 255.224/256.869/259.635/2.010 ms