adzuki bean and mung bean are about the same size, but their colors are quite different (see attached figure).

adzuki bean is sweet and sour, and its sex is flat. Has that effect of clearing away heat, promote diuresis, dispersing blood and relieving swelling.

adzuki beans are not red beans.

mung beans are sweet and cold. Has the effects of clearing away heat and toxic materials and relieving summer heat.