PING www.yiya163.cn (104.21.31.245) 56(84) bytes of data.
64 bytes from 104.21.31.245 (104.21.31.245): icmp_seq=1 ttl=60 time=4.77 ms
64 bytes from 104.21.31.245 (104.21.31.245): icmp_seq=2 ttl=60 time=4.27 ms
64 bytes from 104.21.31.245 (104.21.31.245): icmp_seq=3 ttl=60 time=4.27 ms

--- www.yiya163.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 4.270/4.441/4.775/0.236 ms