Li Dongyuan (1180 ~1251), male, Han nationality, also known as Gao Li, was a famous physician in the Jin and Yuan Dynasties. In his later years, he was an old man from Dongyuan, Zhengding, Hebei. Learning from Zhang is one of the "Four Masters in Jin and Yuan Dynasties" in Chinese medical history, belonging to the Yi School and the founder of the "Spleen and Stomach Theory" of traditional Chinese medicine.
Li Dongyuan emphasized the important role of the spleen and stomach in the human body, because the spleen and stomach belong to the middle earth in the five elements, so Li Dongyuan's theory is also called "the school of tonifying the soil". His main works are Spleen and Stomach Theory, Internal and External Injury Theory, Law of Medication, Medical Invention, Shi Lan's Secret Collection, Vivid Hair Tip and so on.