The terrain of China is low in the east and high in the west, the First Platform in the east is humid low plains and hills, the Second Platform in the central and northwestern part of the cowntry is arid and semi-arid climate, and the Third Platform is highest Plateau of the Qinghai-Xizang, with frigid climate. A Dernarcation Line begins from Heihe of Heilongjiang Province in northeast to Tengchong of Yunnan Province in the southwest. In the northwesterw side of the line there is a population of only 4% of the country's total, while in the southeastern side of the line there is a population of 96% of the total. The author divides the country into eight major Demographic Regions. The general pattern of population distribution of the whole coutry would not change too much in the future years.