Da Huang energy!
Afterward, Xia Man gave Mu Yang a detailed explanation. To cultivate the Nine Yin Nine Yang Fairy Body, one must align both internal and external factors with the laws of nature. Externally, it required using the principles of Yin and Yang to cleanse and wash the body, turning it into a container for Yin and Yang power to prevent conflicts within. Internally, all the forces within the body needed to flow exactly like those outside, reaching a state of blending with nature. In this way, when heaven and man became one, Yin and sun forces would naturally flow into the body and segregate according to the 4:5 ratio.