The first is to regulate diet and protect the spleen and stomach. He believes that "improper diet" is an important cause of internal injuries. "If the diet is doubled, the qi of the spleen and stomach is injured, and the vitality cannot be filled, then all diseases will be born." Therefore, a reasonable diet is an important link in disease prevention and health care;
The second is to regulate emotions and protect the spleen and stomach. Li Dongyuan pointed out: "All anger, sadness and fear will hurt vitality". It shows that spirit and emotion are closely related to physiological changes, especially to the function of spleen and stomach. Therefore, we must adjust from the positive side, and we must be quiet and not work, in order to nourish vitality;
The third is to prevent and treat diseases and protect the spleen and stomach. Dongyuan's legislation on disease prevention and treatment considers the biochemical function of the spleen and stomach everywhere, and pays attention to conditioning and nourishing the spleen and stomach by raising Yang Qi.
Li Dongtan's brilliant theory of protecting the spleen and stomach and prolonging life is unique to health preservation and affirmed by later practice.
Li Dongyuan Zhu Danxi, studied it as a child. When he was in his forties, several relatives in his family died of abuse, so he went into medicine and became a famous doctor after learning from Luo Zhi.