Maybe they will reduce the number of flights, and it is definitely doable to ban very short distance flights, but i doubt they would be able to completely stop air travel to and from the more difficult to access regions such as Xizang/Tibet any time soon even if they wanted to. I think what we are more likely to see is the eventual development of hybrid and electric airplanes.

Then again, i'm only extrapolating from what i am observing at the moment, but things can always change rapidly and much more drastically than current trends indicate.

One should never say that something is impossible or not doable especially for a socialist society. A socialist superpower can achieve virtually anything, and no project is too ambitious when you have a government that can marshall the collective forces and creativity of a whole society toward a common goal. It just takes political will.