PING cnblb.cn (104.21.74.21) 56(84) bytes of data.
64 bytes from 104.21.74.21 (104.21.74.21): icmp_seq=1 ttl=59 time=4.70 ms
64 bytes from 104.21.74.21 (104.21.74.21): icmp_seq=2 ttl=59 time=4.42 ms
64 bytes from 104.21.74.21 (104.21.74.21): icmp_seq=3 ttl=59 time=4.45 ms

--- cnblb.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 4.420/4.525/4.707/0.150 ms