Liver Qi deficiency is also known as Liver Qi deficiency. Liver Qi is the material basis and driving force for the liver to carry out its physiological functions. When Liver Qi is insufficient, the various functions of the liver are seen to diminish and Liver Qi deficiency lesions appear. Liver Qi deficiency evidence commonly exists. The prevention of liver qi deficiency requires conditioning methods mostly to nourish the liver, but also can take drugs to treat the prevention, the following is the common drugs to prevent liver qi deficiency. The formula still uses Chai Hu as the ruler, and follows the nature of its stripes to clear the liver and relieve depression, while Angelica sinensis, Paeonia lactiflora, Atractylodes macrocephala and Yun Ling nourish blood, soften the liver and strengthen the spleen. 2. “Chai Hu Dredging Liver San” is known for dredging liver and Qi, harmonizing blood and relieving pain. It is also supplemented with Radix Paeoniae Alba to nourish blood and soften the liver to avoid depletion of the liver. This formula is composed of nourishing liver and kidney herbs, with the addition of neem, which is used to relax the liver and stimulate Qi, so that the liver can be nourished and the Qi flow can be regulated.