Where is Horizon A that goes with the question?
The desert regions in China that are largely uninhabited are the Iner Mongolia region on the north of the country, and the Xinjiang region on the west of the country.
Saudi Arabia is a country that in most part is uninhibited and people are concentrated in the cities which are surrounded by desert and some partially from sea. The most uninhabited regions are Northern Borders, Jawf, Bahah and Najran.
It is next to a communist nation (North Korea) and its neighbors have extremely corrupt governments. Including China and Russia. They are the only "freest" country compared to its neighboring countries.
The mapmakers have to make this choice because of the shape of our planet and because there is still not a method as to how to have both the land shapes and distances to be precise at the same time.
The shape of the earth is the factor that is not allowing (at least for now) that we have both correct land shapes and precise distances on the maps of the Earth. Because the Earth has a rounded shape, as we move further away from the Equator, the shapes are deforming more and more, or rather they are stretching more and more which makes them appear much bigger than they actually are, thus giving us an unrealistic picture of the size of some of the places on our planet.
Is this Kiara? Or someone else