Apologies for my sarcastic answer, I did actually search for that a little while ago so I do assume most people do know but that’s incorrect. The most useful tool I know of would probably be www.aspi.org.au/…/mapping-chinas-tech-giants/

Let me know if you are looking for something more precise. I know of few other tools which do help better understand who builds what and how, for electronics but other products too.