The liver and lungs are ascending and descending. The liver rises from the left and the lungs descend from the right. When the liver rises, it will be born, and when the lung falls, it will be able to converge. Although the biochemical source of human essence is spleen and stomach, liver and lung are the hub of epidemic source. Liver-qi dominates ascending, essence is transmitted to the head, body and upper orifices, lung-qi dominates descending, essence is released to zang-fu organs and bones, so that qi and blood can prevail and zang-fu organs can be at peace. Lung and liver restrict each other, and it is natural to rise left and fall right. However, the liver is hard, easy to move and rise, and the lung is delicate and easy to restrain, which often leads to the pathological mechanism of "too much liver rising, and the lung has no right to fall", leading to imbalance in lifting and axis obstruction. The liver and lungs are the wings of lifting, and the liver and lungs are the wings of lifting. Liver and lung are for storing qi, and the rise and fall of liver and lung is actually the rise and fall of qi and blood. The liver and lungs are left and right, just like wings. The liver controls the rise and fall of the lung, so the temperature rise of the left semicircle depends on the temperature rise of the liver wood, and the cooling rise of the right semicircle depends on the drop of lung gold. If the qi of liver and lung is out of balance, it will lead to the disorder of qi and blood, which is manifested as the wing function of liver and lung in the ascending and descending circulation.