PING luojiecdn.gradearch.com (103.125.86.51) 56(84) bytes of data.
64 bytes from 103.125.86.51 (103.125.86.51): icmp_seq=1 ttl=56 time=198 ms
64 bytes from 103.125.86.51 (103.125.86.51): icmp_seq=2 ttl=56 time=198 ms
64 bytes from 103.125.86.51 (103.125.86.51): icmp_seq=3 ttl=56 time=198 ms

--- luojiecdn.gradearch.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 198.727/198.809/198.972/0.115 ms