YU Chang

a physician at the end of Ming Dynasty and the beginning of Qing Dynasty

put forward the theory of "diseases in autumn injury resulting from dryness". He expounded the cause

pathogenesis and treatment of dryness disease

which had an important influence on the development of traditional Chinese medicine（TCM）. From the perspective of hermeneutics

YU Chang′s "autumn dryness theory" is actually a recreation of the relevant theories of Inner Cannon of Yellow Emperor（《黄帝内经》）

not a correction of errors. He is to understand and explain the classic texts of TCM with the purpose of interpreting classics and guiding clinical practice under the environment of the times he was in. The annotation of doctors of past dynasties is a kind of historical understanding

which makes the classic text in the process of continuous inheritance realize the value in different times.