PING pro-beijingchuguichang.icoc.cc (104.21.9.108) 56(84) bytes of data.
64 bytes from 104.21.9.108 (104.21.9.108): icmp_seq=1 ttl=59 time=4.88 ms
64 bytes from 104.21.9.108 (104.21.9.108): icmp_seq=2 ttl=59 time=4.80 ms
64 bytes from 104.21.9.108 (104.21.9.108): icmp_seq=3 ttl=59 time=4.72 ms

--- pro-beijingchuguichang.icoc.cc ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 4.726/4.806/4.887/0.103 ms