Duck blood is not drained clean. Before plastic packaging, the duck leg is not thoroughly treated, and the blood in the duck leg is not completely drained, which will lead to a very red surface and has no effect. Duck legs are duck legs, and their nutritional value is similar to that of chickens. Chinese medicine believes that duck legs enter the lung, stomach and kidney meridians, which has the functions of nourishing, nourishing stomach and tonifying kidney.