What are the twelve meridians? The twelve meridians spread widely according to the connection of the hand and foot Yang and Yin in the table, forming a system of endless and mysterious transmission. Qi and blood can reach the internal organs of the five Zang and six Fu, and the muscles and skin, managing the whole body. The order of flow is: starting from the hand Taiyin Lung meridian, successively passing into the hand Yangming Small Intestine meridian, the foot Yangming Stomach meridian, the foot Taiyin Spleen meridian, the hand Shaoyin Heart meridian, the hand Shaoyang Small Intestine meridian, the foot natural light Bladder meridian, the foot Shaoyin Kidney meridian, the hand Jueyin Pericardium meridian, the hand Shaoyang Triple Burner meridian, the foot Shaoyang Gallbladder meridian, the foot Jueyin Liver meridian, and returning to the hand Taiyin Lung meridian.

The periodicity of their advancement and intersection is: the hand three Yin meridians travel from the chest to the hand, and intersect with the hand three Yang meridians at the tip of the fingers; the hand three Yang meridians travel from the hand to the head, and intersect with the foot three Yang meridians on the face; the foot three Yang meridians start again from the foot, and tie up the three Yin meridians at the tip of the toes; the foot three Yin meridians travel from the foot to the abdomen, and intersect with the hand three Yin meridians in the chest cavity.

The circulation and periodicity of the twelve meridians on the outer skin is: the male reproductive organs of all six Zang organs (heart, liver, spleen, lung, kidney, and pericardium) extend to the inner side of the limbs and the chest and abdomen. Among them, the hand three Yin meridians extend to the inner side of the upper limb, and the foot three Yin meridians extend to the inner side of the lower limb. The Yang meridians of all six Fu organs mostly circulate on both sides of the limbs, the face and cheeks, and the back, among which the hand three Yang meridians extend to both sides of the upper limb, and the foot three Yang meridians extend to both sides of the lower limb. The arrangement order of the hand and foot three Yang meridians is: ‘Yangming’ in front, ‘Shaoyang’ vertically in the center, ‘natural light’ in front; the arrangement order of the hand and foot three Yin meridians is: ‘Taixing’ in front, ‘Jueyin’ first, ‘Shaoyin’ in front.

The table relationship of the twelve meridians is: the three Yin and three Yang meridians of the hands and feet, based on the communication and communication between the collateral and collateral channels, forming six pairs of ‘matched’ relationships in the table. Among them, the foot natural light and the foot Shaoyin are in the table, the foot Shaoyang and the foot Jueyin are in the table, and the foot Yangming and the foot Taiyin are in the table. The hand Shaoyang and the hand Shaoyin are in the table, the hand Shaoyang and the hand Jueyin are in the table, and the hand Yangming and the hand Taiyin are in the table.