"Qi comes into existence in Xhong Jiao and concentrates in the region of lungs. Qi moves on the surface of the entire body and inside of it, day and night without stopping for an instant. Qi is also motive power of blood circulation. Xue, blood, is the quintessence of water and cereals diluted in the spleen and the stomach. Blood concentrates in the heart and from there is supplied to the kidneys and the lung from a signal sent by the liver. Blood circulates throughout the whole body, it includes red and white components. The eyes, having received blood, can see. The ears, having received blood, can hear. The hands, having received blood, can take. The feet, having received blood, can walk. It means one should accumulate Qi and feed the body with blood Xue."