For example, in semiconductors, Taiwan, with a much smaller population (and arriving late in the game) beat the US, Japan and Korea. China, with 600k STEM graduates per year, is still trying to catch up.
On covid vaccines, even Russia has their own vaccine that reach mRNA levels of protection, but China is still stuck with the Covid Zero policy.
Quantity was definitively an asset for Chinese growth based on cheap labor. That source of growth is almost running dry (to the point where they are resorting to labor camps). But at some point, quantity becomes more of a liability.