China has eleven times the population of Japan and five times the habitable area. Not far in from the coast, China turns into 2500m+ mountains with Siberian wi

China has eleven times the population of Japan and five times the habitable area. Not far in from the coast, China turns into 2500m+ mountains with Siberian winters and few flat places. Then comes Tibet, the Mongolian desert, and the Gobi desert. None of those places will support cities, and most are dominated by non-Chinese people like Uigurs, Tibetans, Mongolians, and such. The vast majority of China on the map will never be Chinese and never support a major city.