What is interesting to me is that of the two very young cubers I showed, Yiheng Wang and Ruihang Xu, I'll throw in Zaiyang Zhang (张在旸) too with obligatory Brody video
is that while they have decent efficiency, none of them use very complicated algsets or theory and achieve their amazing results just with lookahead and pure execution. I can't generalize that to Chinese cubers as a whole, because we know there are cubers who do have amazing knowledge of algs like Ruimin Yan / CubeRoot, but that's what I saw from these people.