Ge Hong (283-363) was a Taoist theorist, alchemist and medical expert in the Eastern Jin Dynasty. His courtesy name is Yachuan and his pseudonym is Baopuzi. A native of Jurong, Danyang (now in Jiangsu Province). The grandson of Ge Xuan, a alchemy of The Three Kingdoms period. He has a calm temperament and is fond of the art of immortality. He once studied under Zheng Yin and received the inner cultivation elixir technique. In the early years of Xianhe (326-334), he was appointed as a court student 掾, promoted to the position of military advisor, and was granted the title of Marquis of Guannei for his military merit in defeating Shi Bing. Hearing that the south was rich in cinnabar used for alchemy, he submitted a memorial requesting to be appointed as the magistrate of Julu (now Beiliu County, Guangxi). Traveling southward to Guangzhou, he was left behind by the governor Deng Yue and settled down in Luofu Mountain. He continued to write, practiced health and Taoism, and spent his remaining years in the elixir cauldron. His work "Baopuzi" consists of two parts: the inner part discusses "immortals, medicines, ghosts, changes, health preservation, longevity, warding off evil and disasters", and the outer part talks about "gains and losses in the human world, and the merits and demerits of worldly affairs". Its idea is basically to take the cultivation of immortals as the inner self and the application of Confucianism to the world as the outer self. This book inherits and develops the alchemy techniques since the Eastern Han Dynasty, exerting a significant influence on the subsequent development of Taoist alchemy. It provides valuable historical materials for the study of the history of Chinese alchemy and ancient chemistry. Ge Hong also authored the medical works "Yuhuan Fang" in one hundred volumes (which has been lost) and "Elbow Backup Emergency Fang" in three volumes, covering various medical disciplines. Among them, there are the world's earliest records of treating diseases such as smallpox. More than ten of his works are included in the "Zhengtong Daozang" and the "Wanli Continuation Daozang".