Northern and southern firewood from the origin, morphology and other aspects of the difference, the efficacy is basically the same. It is recommended that patients follow the doctor’s instructions to standardize the use of drugs. 1. Origin: the origin of the northern firewood is mainly in Henan, Hebei, Hubei and other places; the origin of the southern firewood is mainly in Sichuan, Jilin, Heilongjiang and other places. 2. Morphology: the northern firewood is mainly the root of the umbelliferae firewood, conical, with little or no fibrous leaf base; the southern firewood is mainly the root of the narrow-leaved firewood, finer in shape, with more fibrous leaf base, usually distributed in the apical part. The effects of Northern and Southern Bupleurum are basically the same, both of them have the effects of relieving the symptoms of fever (relieving evil qi from the surface of the muscle and relieving fever), dispersing the liver and relieving depression (treating depression by dispersing the qi of the liver), and elevating the yang and lifting the sun (elevating yang qi in the body in order to lift up sunken organs), and they are mainly used in the cases of liver depression and stagnation of qi (poor transport of qi and blood in the liver, and depression of emotions and feelings), etc. The adverse effects of Bupleurum are not known. The adverse effects of Chai Hu are not clear, and patients are advised to take it under the guidance of a Chinese medicine practitioner.