The role of the twelve meridians are as follows: first, the role of liaison, through the twelve meridians can connect the five organs and six internal organs, as well as the limbs, five organs, etc., just like a highway to maintain the normal function of the organs, coordinated with each other, forming an organic whole; second, the role of meridian induction, mainly in the human body when an organ or skin surface is stimulated, the stimulation will be along the meridians The second point, the role of meridian sensing, mainly in the human body when an organ or skin surface is stimulated, the stimulation will be along the meridian to other organs of the body, other organs quickly make a certain response, can ensure that the human body as little as possible harm and for the disease has a good response; third point, the role of moistening and regulating, mainly in the human body nutrients can be through the meridian to human organs for nutrition, but also can regulate the human body disease organs.