1, shape difference: Douwang is a leguminous cowpea vegetable, with a slender shape, protruding in the middle, no obvious ribs, and a slender shape as a whole. Beans are also vegetables of the genus Vigna in Leguminosae, with short appearance, obvious tendons and short and thick overall.

2, taste difference: bean king tastes soft and tender, no obvious gluten, tender and smooth after cooking. Beans taste crisp and tender, and the tendons are obvious. When chewing, it will be chewy and crisp.