Vinegar Northern Chai Hu is bitter in flavor, slightly cold in nature, and not toxic. It has the effects of dispersing the liver and relieving depression (treating depression by dispersing the liver qi), relieving symptoms and fever, and elevating yang qi. Vinegar of Bei Chai Hu is obtained from Bei Chai Hu after vinegar preparation, which strengthens the power of the drug to enter the liver meridian and detoxify the liver, and is effective in treating the pain and distension in the dorsal ribs and ribcage caused by stagnation of liver qi (liver qi is not flowing smoothly), depression and mood, and menstrual disorders. Vinegar Northern Chaihu is mainly stronger in its power to relieve liver stagnation and depression, and weaker in its efficacy in relieving exterior heat and elevating yang qi. The drug has no definite toxicity, and its adverse effects and contraindications are not precise. The drug should be taken under the guidance of a professional doctor, do not take without authorization to avoid adverse consequences.