Earlier quoted context omitted.
China has party-authorized Christian churches with exactly your goal in mind. This crackdown is on unauthorized churches. For an example of how they frame it in propaganda: http://en.people.cn/n/2014/0807/c90882-8766262.html
It matches what’s written in the OP article: “The government has focused its campaign on unofficial Christian churches that promote ideas like social justice or have been critical of the party’s grip on society.” And knowing what’s documented about the CIA activities in the past, which include using religion(1) I fully understand that attitude. 1) See https://dgibbs.faculty.arizona.edu/brzezinski_interview but also w…
This is a fact that comes back in the stories of Chinese people very often: it doesn't matter how "approved"/legal or tolerated something is. Parts of the government go after it. Parts of the party are in open war with eachother, to the point that they send child services after eachothers' children, police after restaurants that commit the crime of allowing political rivals to eat there, and then there's the occasional moral panic, which is the most disruptive. Every now and them some fact will make the news, through social media most often.
This may be quality of goods (food for children happened once, but has likewise happened with houses, animal feed, ...), relationship stuff (e.g. a young couple, a girls pictures "leaking", in some cases outright racism (romeo and juliet couple), ...) someone dying from exhaustion while gaming, a few people very sick or dead from food poisoning, hospitals getting caught abusing psychological patients, ... and then the police will take "action".
By that of course we mean arresting hundreds whose only crime is to be in the same street as where the news event happened. Or arrest everyone under 16 out after 18h. Or arrest everyone including owner and customers in every internet cafe, or real cafe. Or ...
They're innocent. Doesn't matter of course. They get convicted. And yet, under normal circumstances, anyone in China will tell you it's absurd what you get away with.