How did Fuxi establish five lines of gossip's theory of Taiji Yin and Yang?

When Fuxi looked up and looked down on Guatai Mountain in the northwest of Mackey Mountain, suddenly a dragon horse flew out of Malong Cave in the sun of Jiulong Mountain on the north bank of Weihe River, wearing patterns and flying on a mottled stone. When Fuxi saw it, he realized that everything in the world was just yin and yang.

Therefore, Fuxi uses white dots to indicate yang, black dots to indicate yin, and yin and yang symbols to distinguish between men and women. Sun, moon, white and sun represent the nature, geography, climate, astronomy, human and natural environment, human body shape, viscera, exterior and interior of the universe respectively. , thus establishing the theory of Taiji, Yin and Yang, Five Elements and Eight Diagrams.