40%人从事农业，自给自足不成，还要提供给其它60%人用食物。2）现在要有1/3的食物靠进口。“Despite its domestic production, China has been a net importer [DOC] of agricultural products since 2004. Today, it imports more of these products—including soybeans, corn, wheat, rice, and dairy products—than any other country. Between 2000 and 2020, the country’s food self-sufficiency ratio decreased from 93.6 percent to 65.8 percent.”