This book focuses on the classic "Danxi Heart Method" handed down by the Yuan Dynasty physician Zhu Zhenheng (known as Danxi), and systematically presents the medical revolution of this founder of the "Yin Nourishing School". The text first restores the historical context of the transformation of Confucian medicine in the Jin and Yuan Dynasties, revealing Zhu Danxi's transformation from an imperial examination scholar to a generation of medical sects, and his ideological process of breaking through the shackles of the warm and dry "Ju Fang". Dialogue with modern times across time and space, demonstrate the enlightenment of his yin-nourishing thoughts on metabolic diseases and psychosomatic medicine, and complete a complete interpretation from historical classics to contemporary values.