PING www.njpwhbj.com (104.21.81.21) 56(84) bytes of data.
64 bytes from 104.21.81.21 (104.21.81.21): icmp_seq=1 ttl=60 time=6.53 ms
64 bytes from 104.21.81.21 (104.21.81.21): icmp_seq=2 ttl=60 time=3.94 ms
64 bytes from 104.21.81.21 (104.21.81.21): icmp_seq=3 ttl=60 time=3.98 ms

--- www.njpwhbj.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 3.949/4.822/6.533/1.209 ms