God is the internet annoying there. They randomly drop packets just to disrupt VPN connections. One method may work today but not tomorrow. I've had luck with alternating between obfsproxy and ssh and l2tp.
The truth is that no one cares. Everyone more or less knows, but it's a pain in the ass to bypass.
I know China uses a lot of Linux... how the hell do they get by with SSH?! If you are an administrator wouldn't SSH immediately flag you as using a VPN?
The truth is that no one cares. Everyone more or less knows, but it's a pain in the ass to bypass.