and how will they even do that.
bitcoin is unblock able until you turn your power stations off, and maybe not even then
Its just another kind of data transered over the internet. Of course it can be blocked. The great firewall is very capable of Blocking stuff.
The great firewall isn't very capable at all. Anything blocked in China is easily accessible through a vpn, nothing more.
Most known VPNs are blocked, they even take messures to block TOR and probably I2P.
My arguement is not that BTC is currently blocked, but that its possible to block a protocol like BTC if you have the infastructure for it. The great firewall is a good example.
As FeedbackLoop allready pointed out, China is probably not going to the full potential.