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 s

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. [1] Ocotillo Wells Airport https://www.google.com/maps/@33.1469143,-116.1300329,587m/data=!3m1!1e3 https://www.google.com/maps/@33.1469143,-116.1300329,587m/da... [2] Salton Sea Airport https://www.google.com/maps/@33.2420755,-115.9513012,1246m/data=!3m1!1e3 https://www.google.com/maps/@33.2420755,-115.9513012,1246m/d...