Xu Shu-Wei : Discourses on the Shang Han Lun By Steven Clavey (Thanks Steve for this introduction and the case studies that follow. Please visit his Chinese medicine journal, The Lantern.) Xu Shu-Wei (许叔微) was a well-known physician who lived during the Southern Song Dynasty (1075 – c. 1156). Having attained a certain level in the imperial examinations, he was known as Xu Xue-Shi — `Xu the Scholar’. He was the author of numerous works in the Shang Han Lun…