PING yundao365.com.cn (104.21.74.201) 56(84) bytes of data.
64 bytes from 104.21.74.201 (104.21.74.201): icmp_seq=1 ttl=59 time=4.99 ms
64 bytes from 104.21.74.201 (104.21.74.201): icmp_seq=2 ttl=59 time=4.70 ms
64 bytes from 104.21.74.201 (104.21.74.201): icmp_seq=3 ttl=59 time=4.81 ms

--- yundao365.com.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2003ms
rtt min/avg/max/mdev = 4.702/4.838/4.997/0.145 ms