Also China knows how to make trains, but much less about making airplanes. So they are not as motivated to develop domestic flights. Even outside of a protectio

Also China knows how to make trains, but much less about making airplanes. So they are not as motivated to develop domestic flights. Even outside of a protectionist angle, when they need economic stimulus, they routinely go for massive HSR construction. It would have been much less effective with airports/planes.