The theory of the five elements (fire, earth, metal, water and wood) is an important system in Chinese acupuncture. On the front side of this Small Chart, a diagram illustrates the points used in acupuncture according to the five elements and their place on the extremities of the body. On the back is a very clear and complete table with the correspondences of the elements, such as life stages, seasons, time of day, tastes, activities and emotions.