Zhang Xichun, a renowned physician of the Qing Dynasty, strongly emphasized that those who study traditional Chinese medicine must practice Qigong to cultivate their vital energy. There are three main reasons for this: First, traditional Chinese medicine prioritizes the prevention of disease, as emphasized in the Huangdi Neijing (The Yellow Emperor's Inner Classic): "To treat a disease only after it has manifested is like starting to dig a well when one is already thirsty
