Soybean, commonly known as soybean, is the seed of the butterfly plant soybean. It is an annual herbaceous crop, with a height of 30 ~ 90 cm and a stout square diamond-shaped stem. Pods are rectangular, flat, 5-6 cm long, drooping, densely covered with yellow slender bristles, with 2-4 seeds, oblate and oval when fresh, 0.8- 1.5 cm long, light green, yellow when dry, yellow-green or purple-black. Spring edamame is vegetable soybean, also known as edamame, green edamame and white edamame, which refers to green pod soybean harvested between grain filling period and early maturity period. The pods are tender green, green and lovely. When the edamame is ripe, it is the familiar soybean.