Kinda related:
I watched a video essay on YouTube about Chinese horror movies and why they are so bad.
The reason was not just regulatory constraints (the ghost turns out to be a dream, because you can’t have ghosts in movies) but also that these changes on quite short notice.
So if you have an idea for a movie and you think it can wriggle around the current regulatory restrictions you better hurry up and film and edit it as fast as possible.