What kind of book is the Book of Changes? Please tell me a friend who knows better, is this a divination book or does it really contain many natural truths?

I only have a slight understanding, not a standard answer.

Strictly speaking, Zhouyi is a book that reflects China's ancient philosophy. Before it, there were two books, Lianshan and Guizang, written by Xia. The divination involved in it refers to the contents of the Book of Changes, but there is a concept that cannot be ignored, that is, a gentleman knows the destiny and measures the destiny, that is, he needs to have the virtue of a gentleman, understand the laws of things, and then use it as divination, so I personally think.