PING ip-www.yuantaiwan.com (104.21.2.223) 56(84) bytes of data.
64 bytes from 104.21.2.223 (104.21.2.223): icmp_seq=1 ttl=60 time=7.20 ms
64 bytes from 104.21.2.223 (104.21.2.223): icmp_seq=2 ttl=60 time=4.06 ms
64 bytes from 104.21.2.223 (104.21.2.223): icmp_seq=3 ttl=60 time=4.17 ms

--- ip-www.yuantaiwan.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 4.061/5.146/7.204/1.456 ms