4. Jinhe rice is produced from high-quality Wuchang rice, and the soil is the root of rice. Wuchang is one of the three black soil belts in the world. The average thickness of grass carbon black soil layer formed after thousands of years is about 1 m, and the thickness of grass carbon soil in forest area is as high as 3 meters, in which the organic matter content is as high as 10%, and it is irrigated by gravity in Lalin River, Mangniu River and Xilang River. Due to the unique geographical and climatic characteristics of Wuchang rice producing area, its dry matter accumulation is more, amylose content is moderate, amylopectin content is more, and its taste is soft.