[Wang Ji's theory of 'Ying-Wei deficiency and excess' and 'Renshen-Huangqi nourishment'].

WANG Ji, the famous doctor in the Ming dynasty, devoted all his life to writing books and had completed 14 books in his lifetime. He established the academic thought of Ying-Wei (Yingqi and Weiqi) deficiency and excess and Renshe-Huangqi which was that both have the function of nourishment. This had a positive influence on correcting some scholars' opinion in the Ming dynasty, which was if using bitter and cold herbs to nourish Yin, it usually damaged the Qi of spleen and stomach; and influence on formation of the Gubenpeiyuan School (consolidating Yuanqi to enhance body resistance). The formation of the thought was related to the background of some iatrogenic illness whereby Yang deficiency of spleen and stomach was caused by excess use of bitter and cold medicine. WANG Ji's academic thought was mainly refined from Ying-Wei theory in the Neijing, spleen-stomach theory of LI Dongyuan and excess of Yang and deficiency of Yin theory of ZHU Danxi, and was also influenced by the thought of other doctors at the same time.