According to the information of heavy building planting technology network, bean horn, also known as vegetable beans, four season beans, hairy beans, in China's northern and southern regions are cultivated. The seeds of bean curd are what we often call bean curd seeds, which is a common edible bean species. There are many kinds of bean seeds, mainly divided into green bean, purple bean, green beans, black bean and so on. These bean seeds have different morphological characteristics, growth habits, yield and disease resistance and other differences. Purple snap peas: the leaves are broader, the pod color is usually purple or with purple and red spots, and the pea seeds are purple or dark red.