6 is definitely true, just from personal experience. It used to be that you could just ssh to a server, tunnel your traffic over it, and you could visit whatever sites you want. Last time I was there, this past October, almost nothing worked. I could still ssh, but if I tunneled web traffic, they somehow detected that and killed the connection. OpenVPN didn't work. I tried a dozen VPN providers, most aimed at the Chinese market, and only found one that worked at all reliably. That one was pretty expensive and it's probably just a matter of time before it stops working too.