Official Chinese policy is religious freedom exists. In reality, religious organizations are tolerated as long as they are advocates for gov't policy. Communism is slowly crumbling in the region. However, many of those in power are old world Marxist. And Marxism leaves little room for religious freedom. Most of any persecution has been directed towards Christians. I don't believe it's anything like what the Coptic Christians have had to deal with in Egypt. And it has gotten much better since the late 60's and 70's when religious movements were effectively banned. But it is very real. They have closed churches, and detained people. They restrict religious groups by requiring them to operate via permit. They have something called the "Three-Self Patriotic Movement". It's essentially a way to ensure that any religious influence is totally compliant with stated gov't objectives. And dissent means you can't operate within the country. They also view it as a way to maintain their idea of a sort of cultural integrity, by preserving their nation and limiting external influence. Overall the degree of persecution these days is more like gov't harassment. But they are not burning people at the stake. I would much rather be a Christian in China, then in Egypt or Iran.