Red sky purple bean seed farm garden base fresh pod long purple rack bean vegetable seeds

In the Northern Song Dynasty, there is a record of cowpea (that is, bean) in the "Map Classics Materia Medica", Su Shi has a poem about cowpea, to the Ming Dynasty, "Benmin Tuzuan" "Compendium of Materia Medica" and other books have cowpea records, which shows that cowpea has been widely cultivated in the Ming Dynasty