I have heard it said as the country loosens up it will eventually be both the largest Christian and largest muslim country in the world, both becomming substantially bigger than THE PARTY. Indeed it must be seriously worrying THE PARTY at the moment, given that they have so severely clamped down on one other mass participation movement - the Falun Gong! A seemingly more harmless organisation it would be hard to find, yet its members have become involuntary organ donors for wealthy Chinese at home and abroad after their executions!
PRC at the moment has a state run catholic church which is totally unrecognised by Rome and I would say that other Christians are facing some trauma to say the least! What if the PRC traditionally had the attitude towards religion that prevailed in some Eastern European countries tolerance up to a point! Of course it would have to apply to Tibet also post invasion!