It has the function of returning yang to save the inverse. According to the inquiry of the Health Care Home, Zheng Qinan, a master of Vulcan, can not only return to Yang, but also help and replenish Yang, and treat all diseases of yang deficiency. Sini decoction is the first main prescription of Vulcan school of traditional Chinese medicine, which was first used in Treatise on Febrile Diseases to save adverse reactions. Mainly used for shaoyin syndrome, characterized by limb syncope, chills and drowsiness, vomiting and thirst, abdominal pain and diarrhea, listlessness and drowsiness, white and slippery tongue coating and thready pulse.