The vast majority of China's cultivated land lies in eastern China. Nearly all of the arable land, totaling 122 million hectares or 13% of the country, is cultivated.[5] To ensure adequate food production, the government has identified a minimum threshold or “redline” of 120 million hectares of cultivated land.[6] Chinese law also requires a one-to-one replacement (in quantity and quality of farmland that is converted to other uses).