Slate soil rice from Mudanjiang City, Heilongjiang Province, Ning'an City, is a kind of northeastern rice, the three northeastern provinces as a grain province, rice planting area has reached more than 5 million hectares, cultivated many varieties of rice, fine quality, and slate soil rice is considered to be a more unique kind of growth of the land for the formation of large areas of basalt formed after the flow of volcanic magma, after a long period of microbial decay, the formation of a thick 20 ~ cm, rich in minerals and fertile soil, high active temperature, long growth cycle, and by the Jingpo Lake outflow of Mudan Lake, a long period of growth, and a long period of growth. The land for its growth is a large area of basalt formed after the flow of volcanic lava, after a long period of microbial decomposition, the formation of a thick 20 to 30 cm, rich in minerals, fertile soil, high activity temperature, long growth cycle, and by the Mudanjiang River upstream of the Jingpo Lake outflow and the underground springs irrigation, so that the slate soil rice particles are full of grains of green such as jade, crystal clear, steamed rice want to be rich, rice after cooking rice aroma, taste of soft and sweet, after tasting often not enough.