Donghui calls a car to describe a person's thinking and knowledge, and can see the essence and internal relations of things through appearances. The five elements represent five kinds of breath or energy in the body, including heaven and earth elements, yin and yang elements, human elements and divine elements. When these energies are full of vitality, they form a vibrant state. This state not only includes the health and vitality of the body, but also embodies a realm of both internal and external cultivation, an open mind, a high degree of insight and wisdom.