Zhang Juren (1883-1960), whose given name is Hanqing, and courtesy name Juren, was born in Huai'an County, Jiangsu Province.
He learned from the same teacher in Huai'an as Yang Haoru, a famous doctor at the capital. In 1910, he came to Beijing from his ancestral home to practice medicine, and served as a traditional Chinese medicine (TCM) doctor at the Department of Internal Medicine of Outer City Public Hospital, and he was famous for his ability to treat febrile diseases. In the sixth year of the Republic of China (1917), when a plague was prevalent in Shanxi-Suiyuan and Langfang areas, Mr. Zhang, together with Kong Bohua and Zhao Yunqing went to the epidemic area to prevent the plague from spreading and achieved remarkable results. He and several famous doctors, such as Kong and Zhao, jointly compiled the book Analysis of Eight Kinds of Infectious Diseases, 10 volumes in total, which became the standard for treating various infectious diseases at that time. During the period of the Republic of China, the Kuomintang government adopted a policy of suppressingTCM by abolishing medical treatment and storing medicines. "With the skin gone, to what can the hair attach it?" Zhang and Beijing's famous TCM practitioners defied the brutal suppression and traveled thousands of miles to Nanjing to question the Kuomintang government. Thanks to their concerted efforts, the Kuomintang government had to retract its orders, and TCMfinally survived. In order to train successors, Mr. Zhang, along with famous doctors Xiao Longyou and Kong Bohua, founded the Peking Medical College and served as a director and professor. His rigorous academic spirit and unique insights into TCM theory won the admiration of scholars.
In 1956, he was appointed Vice President of Beijing Hospital of TCM and served as a Consultant to Beijing Association of TCM. At his eighties, Mr. Zhang, besides worked in the outpatient service and trained his apprentices, wrote the book entitled Juren's Notes on Medical Treatment by collecting his life-long experiences in medical practice and medical records, leaving a precious spiritual wealth for future generations.