Things around us are derived from Taiji, with constant evolution, we have one important diagram in Chinese Metaphysics -- the He Tu.
He Tu formation is known as the perfect balance of Yin and Yang, picturing the condition of a perfect world.
He Tu or Yellow River Diagram “born” when Fu Xi had his trip to Yellow River, where he saw a dragon-headed horse with Specific pattern of black and white dots on the body that matched his finding on heavenly phenomena.
There is the beginning of the light symbolized by 1 dot (Yang) at the bottom of the diagram, as the Yang is at its peak, then follow 2 dots ( Yin) on the top where the Yin energy will start to manifest. The 3 dots ( Yang) means the Yang is growing stronger and we need another number to represent it and the 4 dots ( Yin) then gains momentum again as the day goes by. 5 dots in the center act as “medium” for the 4 cardinal direction/elements/season ( clockwise from below : North East South West - Water Wood Fire Metal).
He Tu combinations of numbers embody the Yin and Yang pairing of the five elements that also can be represented by the 12 Earthly Branches. With this He Tu Diagram, we also notice that the difference between each dot's pair is 5.
1-6 Represents Water ( Pig Rat)
3-8 Represents Wood (Tiger Rabbit)
2-7 Represents Fire (Horse Snake)
5-10 Represents Earth ( Dragon Dog Ox Goat)
4-9 Represents Metal ( Monkey Rooster)
He Tu also introduces us on Production Cycle when we see Five Elements ( clockwise formation starts from below)