Zi Zai Jing (also known as Zi Zai Jing), also known as Yin He, with the courtesy name Zhuo Wu, and also known as Si He Shan Ren, was from Changzhou (now Wuxian, Jiangsu). In his youth, his family was poor, and he once made a living by selling calligraphy in temples. However, he was intelligent and studious, skilled in poetry and prose, with a calm personality and indifferent to fame and fortune. He studied under the famous Suzhou physician Ma Shu, and after mastering Shichuan, he practiced medicine, gaining fame at the time. In his later years, his diagnostic and treatment skills became even more refined. He studied diligently, read extensively in medical texts, and delved deeply into the works of Zhongjing. His works, Jingui Yaolue Xindian in three volumes (1729), Cold-Damage Disease Guan Zhu Ji (published in 1810), are influential works in the study of Zhongjing's theories. He also authored Jingui Yi in eight volumes (1768), Medical Reading Notes in two volumes (1729), and Jingxiang Lou Medical Cases in one volume, all of which were circulated in the world.