How does Zhouyi describe the changes in the universe?

The Book of Changes describes the changes of the universe through sixty-four hexagrams, which are composed of two hexagrams and three hexagrams, each of which is divided into yin and yang, thus forming sixty-four different hexagrams.

Numbers represent a state or situation with a specific meaning, which is usually used to explain the changes of everything in the universe in Zhouyi.

According to Zhouyi theory, the universe is a constantly changing system, and its changing process can be described by sixty-four hexagrams. These images are usually used to predict weather, natural disasters and human behavior. For example, in the Book of Changes, there is a saying that "the weather is not as good as the geographical position, and the geographical position is not as good as human harmony" (Book of Changes), which means that the development of human society needs to conform to the three factors of the weather, geographical position and human harmony.

In a word, The Book of Changes describes the changing law of the universe through sixty-four hexagrams, and applies it to real life for prediction and guidance, which has influenced China's ancient philosophy, culture, politics and other fields.