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=275 ms
64 bytes from 180.163.233.31 (180.163.233.31): icmp_seq=2 ttl=54 time=273 ms
64 bytes from 180.163.233.31 (180.163.233.31): icmp_seq=3 ttl=54 time=273 ms

--- proxy.cn.qizhihaotian.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 3158ms
rtt min/avg/max/mdev = 273.371/274.192/275.791/1.281 ms