How does Zhouyi divine? What does the Book of Changes mean?

The Book of Changes is another name for Zhouyi. In ancient times, ordinary works can only be called "books", and only works that have been circulated for a long time and provided core ideas and guiding significance for the development of the whole culture can be called "classics". For example, the Bible, the Koran and the Book of Changes. All these works provide many ideas such as philosophy, which have a far-reaching influence on the direction and ideology of a culture and are enduring.

Simply put, the divination of Zhouyi is to take a condition, such as a time, a shaken sign or coin, or a word, and then substitute this condition into the law of Zhouyi to calculate the result. It's a bit like algebra of X and Y solutions in mathematics.