I don’t think you understand how China’s economy works. Seems very clouded by anti-China propaganda.
In reality, the working class exercises a great deal of control over the means of production in China, and the 996 culture you’re referring to is in fact illegal.
https://www.bbc.com/news/world-asia-china-58381538.amp
Again, capitalism vs communism is not defined by the existence of production/profits/markets, but how control and benefit of those systems is distributed.