Those film techniques are outdated for our 2 second attention spans. From what i can remember, pre-2000 prc film and tv were pretty terrible. They only got better once they started co-productions with taiwan/hk which were influence by the west/free-market techniques rather than communist/state led techniques.
I don't say to abolish private for profit film studio, what i want to say is established state institution to experiment with filmmaking, i mean i'ts kinda like china today when there are private firm and state firm. Also, china doesn't learn or train from soviet when in come to live action film when hundred flower campaign happened. (Before sino soviet split).
A little bit history that people here often overlooked. When hundred flower campaign began, Mao didn't care about live action film (didn't know the reason some say because life action film was very expensive). The chinese government established shanghai animation film studio. The studio then trained under soviet animator with the request from Mao and the soviet agree. The studio then produced award winning animation but people/artist who watched the film think the film was from soviet union. So, beginning in late 50s and early 60s, the studio experiment to make their animation looks more chinese and experimenting animation with different medium (paper, stop motion animation, ink animation). It was huge success that many of their film winning award and at that time, many japanese animator inspired by them. But, the cultural revolution happened, so many of the artist got persecuted and went to the countryside doing manual labor work. After the end of cultural revolution, their artstyle also changed, the artstyle became more and more abstract. But, starting in the 90s, the studio didn't very active again because it's cheaper and bring more money to outsourcing rather than producing. The reason of this is because the government didn't care and put little funding to the studio so the studio doing outsourcing to survive.
The studio is active again and still influencing chinese animator to this day, their recent collection of short film that their release on bilibili (jan. 2023) became hit and some of them winning award. Private for profit animation studio in china take inspiration from them and learn how to produce their animation in different format from shanghai animation film studio. A good example of this is the movie deep sea (深海) where the studio want to try ink animation in the format of 3d in some scene.