The role of the meridians is as follows: 1, the role of contact, the human body is composed of five organs and six internal organs and other related organs, through the meridians to build an effective liaison, the body as a whole to carry out the coordination of related functions, the organs can be organically linked together through the meridians, the human body coordination of yin and Yang has great benefits. 2, the role of induction, meridians can not only run qi and blood, but also can transmit a variety of information. The body is stimulated, for example, when the body is stimulated, the stimulation will be conducted along the meridians to the relevant organs of the body, so that the relevant organs function changes. 3, moistening role, the meridians can run the qi and blood to the body’s organs and tissues, can make the body resist external evil, to defend the body. 4, regulating role, the meridians can regulate the body’s yin and yang, so that the relevant diseases appear through the meridians to adjust, for the qi and blood is not in harmony, the yin and yang is in abundance, weakening. It is possible to adjust the yin and yang of the body.