I suppose when China will possess of 4 billion mu of cultivate land, which equals to 2.7 million square kilometers and another 1.14 million square kilometers for living, road, industries, constructions and so on, total areas are 3.84 million square kilometers, which equals to about 40% of our current territory, which belongs to Chinese living areas and our life is likely to be limited within them. The remainder 60% of territory becomes wild animal and plant region, the human beings don’t go to disturb the areas as far as possible. It is known that using 4 billion mu of high quality cultivated land can produce enough grain for 1.5 billions of Chinese population or more. On the temporary idle land don’t seed and let them to overgrow wild grass and trees and to become wild creature family.
(to be proofread)