PING best-casio.kuaixue8.com (104.21.17.69) 56(84) bytes of data.
64 bytes from 104.21.17.69 (104.21.17.69): icmp_seq=1 ttl=59 time=4.95 ms
64 bytes from 104.21.17.69 (104.21.17.69): icmp_seq=2 ttl=59 time=4.62 ms
64 bytes from 104.21.17.69 (104.21.17.69): icmp_seq=3 ttl=59 time=4.61 ms

--- best-casio.kuaixue8.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.610/4.730/4.953/0.157 ms