What is the primary reason that China can stay on top of the manufacturing QUANTITY race?

The Chinese have managed to out number the Americans and other technologically advanced nations in fighter jets, warships, electric vehicles and just about everything else.
China has the advantage of cheap (and probably exploited) labor
Other countries (the USA as the best example) have high minimum wages that hinder production
Select gender and age to cast your vote:
What is the primary reason that China can stay on top of the manufacturing QUANTITY race?
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