Autumn is a harvest season. Farmers beam with delight if the yield is good.

But this year's harvest wasn't easy. Last autumn's flood and the extreme high temperature and drought this summer put too much pressure on food production. How did China overcome these difficulties?

China has managed to feed one-fifth of the global population with 9 percent of the world's arable land. What lies behind this achievement? What role do science and technology play?

China's achievements have reached beyond its borders. Its agricultural technology has even helped fighting tribes in Papua New Guinea sign peace agreements. What's the secret to this success?

Watch our video to find out.