Haneulgaae Black-eyed Beans 500gWhat is Jwinun i kong? Jwinun i kong is an annual plant belonging to the legume family. Its stems and leaves are brown, and while the leaves resemble those of the common soybean, they are somewhat wider. The seeds turn black and small when ripe; according to the *Compendium of Materia Medica*, Jwinun i kong is a black soybean. [Appearance] It is a type of black bean. The skin is black and glossy, while the inside is blue. It is widely used as a