Also known as green soybean.Depending on the color of its cotyledons, it is divided into two types: green skin and green flesh soybeans, green skin and yellow flesh soybeans.Green beans are rich in protein, containing various amino acids that the human body needs, especially lysine content is high.Soybean belongs to the legume genus of the pea family, an annual herbaceous plant.China has been cultivating it for a long time, with a planting history of 5000 years.Now cultivated all over the country, mainly in Northeast, North China, Shaanxi, Sichuan and downstream of the Yangtze River region, with more cultivation in the Yangtze River basin and Southwest. The quality of Northeast soybeans is the best.The world's cultivated soybeans were directly or indirectly introduced from China.