we realized that device not working is super inconvenient.
But... there are many factors to make MJ down, such as your modem changed an IP... machine expired... cable broken...
Please help us find the problem according to the following method ：
Make sure your are connecting to MJ's WAN port. If not, please connect to WAN port and reboot MJ.
try to visit www.baidu.com -> this site will always connected in China.
if you cant visit baidu, means your modem / original router have some problem with DHCP and made MJ device get an not functional IP.if baidu works, please visit https://mj-networks.com -> check if your machine expired.