Zhang Zhongjing (about 150-219 AD),also known as Zhang Ji,was from Nieyang,Henan Province.He was one of the theory founders of traditional Chinese medicine and he made far-reaching impacts on the development of tradi tional Chinese medicine,for which he was respectfully addressed as Medical Sage.Zhang lived in the East Han Dynasty (25-220 AD) and there was little account of his life in the books compiled by the local govment.Zhang was firstly mentioned in the preface of Mai Jing (The Pulse Classic) by Wang Shu-he of the 3rd century,in which he was acclaimed for rigorous scholarship.Wang said that Zhang always insisted on getting to the bottom of everything.