ASML is strong example of your
logic. It is complicated
machines. Very very
complicated. And it takes forewer to reverse-engineer
them. But in most cases, china successfully replicated almost
everything. Also chinese people getting education in best USA universities and returning back to china, building first quantumn-engagement communication satellite in world, suber big radiotelescopes,
aviation. Also, chinese-taiwan fabrics got documentation on every iphone/laptop/CPU they
made. This is a lot of information for chinese
reverse-engineers.