I'm not digressing at all. Your argument is that EUV tech is somehow exceptionally complex, therefore China cannot create it's own version in a reasonable time frame. The direct response to that claim is to point to examples of complex technologies that China has mastered and advanced.

China leads the world in new patents and has mastered several technologies which even America has not. Given that the current leading purveyors of EUV are the frickin Dutch, not the Americans, there's no basis to claim that EUV is exceptionally complex such that the world's leading scientific and econmic power cannot reproduce it.