Abstract
The magnum opus of the famous physician Wang Haogu in the Yuan Dynasty, "Yinzheng Lueli (Brief Examples of Yin Syndromes)", invented the "Yin Syndrome" theory based on "The Treatise on Febrile Diseases", systematically discussed the theory of "cold drinking leads to internal injury", and advocated the treatment of warm tonifying the spleen and kidney rather than heat tonification, initiated the study of "warm tonification" in the subsequent Ming and Qing Dynasties. These have played an important role in the inheritance and advancement of the Yishui School, and also have a profound impact on the Chinese medicine theory and the diagnosis and treatment of diseases in later generations.