Yang Qi is a physiological term. In terms of function and form, Yang Qi refers to function, in terms of zang fu function, it refers to the qi of the six fu organs, in terms of the qi of Ying and Wei, it refers to the qi of Wei, and in terms of the direction and nature of movement, it refers to the outward, upward, exuberant, enhanced, and clear Yang Qi.
Yang Qi is the driving force of human material metabolism and physiological function, and is the decisive factor of human reproduction, growth, development, aging and death. The normal survival of human beings needs the support of Yang Qi. The so-called "Yang gains are born and Yang loses are dead". The more "yang qi", the stronger the human body. If yang is not enough, people will get sick. If yang is completely exhausted, people will die.