active 168-196 Zhongjing Zhang

Living during the late Eastern Han period, Zhang Zhongjing is traditionally dated to around 150–219 CE, though exact details of his life are uncertain. He was from what is now Henan, and later generations honored him with the title "Medical Sage" for his importance in Chinese medical history.

He is most closely associated with the classic medical text Shanghan Zabing Lun (Treatise on Cold Damage and Miscellaneous Diseases). That work became enormously influential, and later scholars divided and transmitted it in forms such as the Shanghan Lun and the Jingui Yaolue, two major texts in the traditional Chinese medical canon.

What makes Zhang Zhongjing especially notable is the way his writing organized symptoms, patterns of illness, and treatments into a coherent clinical approach. Even centuries later, his ideas remain central to the study and practice of traditional Chinese medicine.