But isn't it easier to copy some existing approach than to create it from a green field? ASML tech is presumably highly protected, but China is also very good in spying, hacking etc.
It's a whole system that China needs to duplicate.
Sure, there’s some hard lessons along the way; but far, far, far fewer than figuring it out in the first place.
And this misplaced assumption about how China won’t be able to innovate when standing on the shoulders of giants (with you saying ‘are always going to catch up’) looks only at the last 100 years and forgets the millenia before it. The West is not magically superior.
Edit: for a comparison, it took the Soviet Union 4 years to have their own Atom Bomb after the US dropped two.
Like, Independence Day style?