Liver yang, opposite to liver yin, refers to the yang qi of the liver and its functions involve warming, promoting, stimulating, and ascending. Liver yang mainly warms the liver and activates its physiological mechanism. It also restricts liver yin from over-inhibiting and prevents excessive yin cold, which help to maintain the normal function of coursing the free flow of qi and storing the blood. Liver yang plays an important role in the activities of coursing and discharge. The liver is an unyielding zang-organ. Liver qi is ascending and active in nature, similar to the property of wood in stretching smoothly. Thus the liver prefers stretching and detests depression. The ascending function of liver yang promotes liver qi to ascend upward and disperse outward, which regulates the flow of qi and governs its coursing and discharge.