What are the five elements in nature?

Heavenly stems and earthly branches is used for timing and counting, and it can also be used for making calendars.

Five elements (aviation sound) are five "elements" created by people to explain nature, which can represent many things, such as orientation, body, medical care and so on. But they are just symbols. You can use ABCDE if you like.

Why are the Yijing, Ganzhi and Wuxing all related to "Heaven"? This is because human beings want to understand and explain nature, so they have created many theories. In fact, this is easy to understand, because everyone thinks that everything, time and life in the world are endowed by nature, that is, the sky and the universe, so it is natural to explain them with these things. There are still many people who want to express it with some simple symbols and formulas, and the theory of five elements is one of them. So it can't be said that they came from the sky.

In addition, some people say that I ching and gossip are an algorithm. Actually, this was later. Originally, Zhouyi came out as a philosophical theory, and it was also used to explain everything in nature by combining some simple symbols.

As for someone who uses the Eight Diagrams of the Book of Changes to tell fortune, that is another matter. It's hard to say whether there is any basis. It all depends on theory.