Let me tell you, the circular distribution of the twelve meridians starts from the ends of the limbs, gathers in the joints and bones, and reaches the head of the trunk. The twelve meridians runs on the body surface, but does not enter the internal organs. There are rigid tendons and soft tendons. Stiff (yang) tendons are distributed in the nape and outside the limbs, mainly in the yang meridian tendons of hands and feet; Soft (yin) tendons are distributed in the chest, abdomen and inside of limbs, mainly in the yin meridian tendons of hands and feet. The tendon of foot Sanyang meridian starts from the toe, goes up along the outer thigh and ends in smoothness (face); The tendon of the foot three yin meridians starts from the toe and goes up to the vulva (abdomen) along the thigh; The tendons of the three yang meridians of the hand start from the fingers and go up along the meridians to the angle (head). The tendon of the Sanyin meridian of the hand starts from the finger and goes up to the heart (chest) along the meridian.