I can’t connect to WIFI, whether it’s a phone hotspot or WIFI, it just connects briefly and then disconnects. I tried many times, like changing DZ and then restarting to try to reconnect to WIFI, but it still didn’t work.
Hey @xiaxiaota, if you haven’t already emailed support about this please do so. I believe that the issue is related to your physical location (assuming you are in China?) Some networks are blocked in certain countries, China being one of them. We have a solution by way of firmware update so shoot an email to support and we will give you the necessary files and instructions on manually updating your device 
Hello, the system cannot connect to WiFi, but it can connect now, but sometimes it takes a while to connect.
You sent me a manually updated system file before, and I have successfully installed it according to your steps.
My current device can upload Logbook normally, do I still need to manually update the system?
@xiaxiaota I just checked and you have the correct firmware so no need for an update. Glad to hear the problem has been resolved