The meaning of the five elements includes five basic trends in the evolution of Yin and Yang: water (moistening the lower part), fire (burning the upper part), gold (converging), wood (prolonging) and earth (neutralizing).
These five elements are interdependent:
If the sky has no soil, it can't cover the earth; If there is no soil on the ground, it can't carry everything on the ground, and there is nowhere for grain to grow; Without soil, people can't reproduce naturally without five years. So heaven and earth can't be soilless. If wood is soilless, it has no power to cultivate; If fire is soilless, it can't shine everywhere; If gold is soilless, it is difficult to be sharp; If water is soilless, it can't flow around by topography.
If there is no water and wood in the soil, nothing can grow; Without fire and gold, it cannot thrive. This is the essential truth of the five elements, and the five elements are also constructed from it.
Five stars, called five latitudes in ancient times, are five planets in the sky. Wood is called the old star, fire is called the twinkling star, earth is called the town star, gold is called the white star and water is called the morning star. Five elements of operation, divided into 28 dormitories. Because its orbit is not far from the sun road, the ancients used it to mark the sun.
The five stars generally appear in the Arctic sky in the order of wood, fire, earth, gold and water. Each star has a 72-day line, and the five stars circle 360 degrees. The river map drawn according to the five-star astronomical phenomena is also the source of the five elements.