I logged in to China to show that the server lost connection?

may be related to current network stability, please try to log out of the software, and find "Control Panel" in "My Computer" and click "Firewall" to set the Chinese pass as "exception".

As shown in figure:

If you still show "lost connection with the server", please click on the center of the software in the round button, "account login" will be "HTTP proxy landing" Selection tick, click the application to determine, and then landing again try. Or check whether your network is a proxy server or campus network, and if so, please contact network management to see if you have blocked the UDP port of China Pass.