It is done much more quietly than before. For instance, after the many "sanctions" imposed by USA China has stopped submitting benchmark results from their top

It is done much more quietly than before. For instance, after the many "sanctions" imposed by USA China has stopped submitting benchmark results from their top supercomputers, to make more uncertain their true capabilities. Also Huawei has no longer published detailed descriptions of their new smartphone chipsets, like they were doing when they could still manufacture them at TSMC. The so-called "sanctions" used by USA are not real sanctions. Real sanctions are conditioned by political demands, like requesting guarantees from China that they will not attempt to expand outside their current territory, or that they will treat fairly their minorities. The USA "sanctions" are just anti-competitive measures designed to sabotage the competitors of US companies like Qualcomm and Micron and they have been introduced precisely when those companies were in serious danger to be overtaken in the market by their Chinese competitors. The principal effect of the USA "sanctions" has been to ensure higher prices all over the world for certain consumer products, mainly for smartphones and SSDs. Their military effects are negligible.