4.0.x是正在完善的新版本，当然更新会很频繁
I'm using windows10, chrome.
I think it's not the proxy setting. Everything was fine till yesterday. 
Can you attach or private message me the logs? It's not normal if you can connect but the internet doesn't work.
What ISP are you using? It seems like the quality of the connection is very poor. Perhaps I can add some bridges that will improve your connection.
Jeez, thanks a lot but you don't need to suffer like that.
It says 中国 江苏 无锡 滨湖 中国电信
But maybe because i'm using hotel's public network.
I'm planing to move to another hotel tomorrow, so.. let me try in the other place.
Agian, Thanks for your all concern.
看来iOS有希望了