In Yi-ology, eight diagrams study images, and everything in the world has various forms, all of which are called images. Yi-ology classifies all the complicated things in the world into one hexagram, and uses gossip to imitate everything, that is, everything is like an image. It is difficult to count the types of things imitated by Liu Yi, and the classification is based on the symptoms and significance of gossip itself. Knowing this, we can know which divination all kinds of things should belong to.
In other words, eight functional attributes of everything in the universe, namely eight dynamic images, are the basis of image classification. If the divination is dry, its divination is like the divination of three yang and pure yang, and its number one or five lines belong to gold, and in the northwest, the color is white. The Book of Changes said: "For the sky, for the circle, for the monarch, for the father, for the jade, for the gold, for the cold, for the ice, for the red, for the good horse? For Guo Mu.