The interaction of yin and yang refers to the process in which yin and yang qi react to each other and combine during movement. .
The "Book of Changes" pointed out when discussing the hexagrams: "If heaven and earth are in harmony, it is Tai"; "If heaven and earth are not in harmony, it is No". When heaven and earth intersect, the hexagram is Kun above and Qian below; when heaven and earth do not intersect, the hexagram is Qian above Kun and below. Because the qi of heaven and yang originally rises, while the qi of earth and yin sinks, with yin at the top and yang at the bottom, only the yin and yang of heaven and earth can interact with each other and maintain the vitality of nature. If yang is at the top and yin is at the bottom, then the yin and yang qi of heaven and earth cannot interact with each other and fall apart, so it is called "no". The actual situation is that heaven is at the top and earth is at the bottom.
The interaction of yin and yang refers to the process in which yin and yang qi react to each other and combine during movement. The mutual interaction of yin and yang unites two opposing things or forces into one, thus producing nature, all things, and human beings, and making nature constantly in motion and change.