Some people think that the Book of Changes originated from "Hetu" and "Luoshu". Legend has it that in ancient times, there appeared dragon horses with pictures on the back of the Yellow River, and spiritual turtles with characters on the back of Luoshui. Therefore, the sage Fuxi drew "innate Eight Diagrams". Up to now, in Chinese society, anyone who believes in Feng Shui must have heard the Book of Changes, and no Feng Shui teacher knows nothing about the Book of Changes. It can be seen that the Book of Changes can indeed be used for divination.