PING pro-www.yf883.icoc.cc (172.67.159.193) 56(84) bytes of data.
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=1 ttl=60 time=4.81 ms
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=2 ttl=60 time=4.79 ms
64 bytes from 172.67.159.193 (172.67.159.193): icmp_seq=3 ttl=60 time=4.75 ms

--- pro-www.yf883.icoc.cc ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2001ms
rtt min/avg/max/mdev = 4.753/4.790/4.818/0.027 ms