Wu Tang, styled Jutong and also Peiheng, was a native of Huaiyin, Jiangsu. In his youth, he studied Confucianism. At the age of nineteen, his father passed away, and he was overwhelmed with grief. Consequently, he extensively purchased medical books and studied them. Upon reading Zhang Zhong-jing Treatise on Cold Damage Diseases‧Preface and the discourse on "pursuing external fame and disgrace while forgetting one's own life and body," he resolutely abandoned his pursuit of the imperial examinations and devoted himself entirely to the study of medicine. In the autumn of the Guimao year of the Qianlong reign (1783), he went to the capital and participated in the transcription and collation of the Complete Library of the Four Treasuries, where he had the opportunity to read Wu You-ke Treatise on Pestilence, which greatly enlightened him. In the Guichou year (1793), a pestilence broke out in the capital. At the insistence of his friends, he began treating patients, but most of the cases he encountered were already in a critical state due to incorrect treatments. Wu Tang managed to save dozens of lives, while countless others perished at the hands of mediocre physicians. As a result, Wu Tang authored the Systematic Differentiation of Warm Diseases, which took him six years to complete. In this work, he proposed the theory of "triple energizer pattern identification," establishing it as a cornerstone of the warm diseases school. Thereafter, Wu practiced medicine diligently for over forty years, successfully treating numerous severe cases. In his later years, he wrote the Book on Curing the Illnesses of Physicians (1831) in two volumes, critiquing the shortcomings of contemporary medical practices and expounding on medical ethics, which was also highly regarded by society. His medical cases were later compiled and edited by his descendants into the Medical Cases of Mr. Wu Ju-tong (also known as Wu's Medical Cases) in five volumes (sometimes recorded as four volumes), which remains a cherished text among medical practitioners.