PING proxy.cn.qizhihaotian.com (180.163.233.31) 56(84) bytes of data.
64 bytes from 180.163.233.31 (180.163.233.31): icmp_seq=1 ttl=54 time=279 ms
64 bytes from 180.163.233.31 (180.163.233.31): icmp_seq=2 ttl=54 time=279 ms
64 bytes from 180.163.233.31 (180.163.233.31): icmp_seq=3 ttl=54 time=279 ms

--- proxy.cn.qizhihaotian.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2107ms
rtt min/avg/max/mdev = 279.421/279.611/279.984/0.505 ms