PING dz-www.sh12333.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=60 time=4.16 ms
64 bytes from 104.21.9.108 (104.21.9.108): icmp_seq=2 ttl=60 time=4.23 ms
64 bytes from 104.21.9.108 (104.21.9.108): icmp_seq=3 ttl=60 time=4.08 ms

--- dz-www.sh12333.icoc.cc ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 4.086/4.160/4.233/0.060 ms