It's true though, the rules from the censorer are vague and inconsistent. The way it works is if a piece of production has buy in from the government then then its much more likely to get through censorers regardless of how spicy it is. Wukong had a lot of buy in from multiple provincial governments (Shanxi in particular) as well as CCTV. If censorer tries to shoot it down the next day they're going to start getting calls and political pressure from all the government stakeholders, and that's something bureaucrats would rather do without so they just greenlight it all the way.What restrictions? There's pretty much only politics and also if they want to be rated under 18, on lewd content.
Look at wukong it's like 100% violence content. And also ghosts????? Literally never seen any source talk about it. Some 50% of wukong bosses are ghastly Buddhist inspired demons. Even fucking pg13 genshin has a ton of afterlife themed content.
Phantom Blade coming eventually with so far looks like more realistic gore than Sekiro.
The politics thing I've always felt should be completely removed. Media should be used to shape the narrative of politics and history.
It's like how Let the Bullets Fly can have some very "problematic" take on early CPC history depending on your read of the movie. But seen as the production has the personal patronage of Jiang Zemin no censorer would dare to say the movie needs to be banned because it doesn't fit with CPC values, and I know the party's values better than The Elder himself.