1, shaped like a stone. Adzuki bean: oval ball with a particle size of about 0.5㎝. Cowpea: waist-shaped, with a grain length of 1.2 to 1.5㎝, a width of 0.6 to 0.8㎝ and a thickness of about 0.3㎝.

2, the color is the same. Small red bean, also known as red bean, is red, with shiny shell and hard texture. Cowpea is purplish red, dark and dull, with wrinkled skin.

3. Different uses. Adzuki bean is a leguminous food crop. Cowpea mainly produces cowpea horns, which can be classified as vegetable non-staple food crops.