Gunpowder, paper & printing, magnetic compass... more important than Internet in their times. I wouldn't call their culture lacking innovation.
Not to say that the US didn't do it, or that Japan was also well known in the 70's for much the same thing, but to say that it is only because China has "more people" and more "probability" is misleading. The practice is widespread and encouraged, not just by their culture, but also indirectly by their government.
Must be the most innovative discovery of all times