Heres a list of Airports in China vs the US. Looks to me that America has a lot more smaller airports, vs china which mostly has bigger airports for airliners and such.
I can't speak for China, but after a quick glance, I can name two actively used airports in the US that I can find on this map that are nothing more than flat stretches of dirt.
[Edit] They're generally used for hobbyists. Although, I once watched a V-22 Osprey practicing touch-and-goes at [1] below -- kicked up all kinds of desert dust. I've never felt more like being in Half-Life than at that time.
https://en.wikipedia.org/wiki/List_of_airports_by_ICAO_code:... https://en.wikipedia.org/wiki/List_of_airports_by_ICAO_code:...