诚如本期专题策划所言,中国虽然人口众多,国民生产总值已跃居世界第二,但人口与社会经济活动主要集中在占国土面积不到12%的平原地带。这其中,人口密度最高的中东部平原所占的国土面积只有5%,而人口则占到全国总人口的30%。2010年gdp产值则占到全国总量的近50%。可见中国中东部平原地区的土地资源所承载的人口与社会生产压力之大。 As stated in this special issue plan, although China has a large population and its gross national product ranks second in the world, its population and socio-economic activities are mainly concentrated in the plains that account for less than 12% of its land area. Among them, the Central Plains, the highest density population, accounts for only 5% of the country’s land area, while the population accounts for 30% of the country’s total population. Gdp output value in 2010 accounted for nearly 50% of the national total. It can be seen that the land resources in the plains of the central and eastern regions of China bear great pressure of population and social production.