You can use facebook everywhere there is internet connection. Its available pretty much everywhere in the world. So you should be able to use facebook in china.
Thank you for your answer, but apparantly you are not aware that the Chinese government blocks a lot of websites like facebook, youtube, twitter, foursquare etc. etc.
I was randomly looking for an article I'd written to link a friend and it was on Excerptz. When I arrived on the site I got this message:Excerptz closed on 13th August 2012. Authors have 60 days to remove their content...