“Official” or “authorized” churches operate relatively freely. The main restriction is that they must recognize and respect the government and its Marxist trappings. “Home” churches are unauthorized and those who run them risk prosecution. As far as I know and have seen (I’ve lived in China, worshipped in China, and have studied China in my profession), no one is persecuted simply for practicing “mainstream” faith - so long as they do not proselytize or challenge the established regime.
Much is made of the Uighur situation. But my own understanding and opinion is that whatever oppression exists results mainly from China’s fear of rebellion and terrorism, coupled with the resistance of many Uighurs to social integration. Nonetheless, a huge Uighur population still lives (relatively speaking) freely in NW China.
Perhaps I’ll be flamed for these observations, but I offer them honestly based on experience and study.
If it matters, despite my handle, I’m not Chinese.
Preaching about the resurrection of Jesus is forbidden.
• Preaching about the second coming of Jesus is forbidden.
• Preaching against religions that deny the deity of Jesus is forbidden.
• Preaching that atheist Communist heroes went to hell is forbidden.
• Preaching cannot deny that all good Communists go to heaven.
• Preaching against abortion is forbidden.
• Preachers can preach only at the Three Self church to which they are assigned.
• Worshipping outside Three Self churches and official "meeting points" is forbidden.
• Importing Bibles is forbidden, even if they are given away for free.
• Printing Bibles is forbidden, even if they are given away for free.
• Evangelizing or giving out tracts is forbidden.
• Government officials cannot be Christian.
• Police officers cannot be Christian.
• Soldiers cannot be Christian.
• Teachers cannot be Christian.
• Children cannot become Christian.
• Teenagers cannot become Christian.