The evolution of literature is like the rushing of a river. It conveys different sounds due to the ups and downs of the terrain. The stream is silent at gentle places, and surging continuously at steep turns. A waterfall falls from the cliff, pearls and jade splash, the plains are endlessly rushing, and the snow waves rise higher and higher. , literature uses the human spirit to pass on the fire and remains fresh and true over time. A diachronic observation of the origins of literature, the ups and downs of writers from generation to generation, and the succession of several schools. A synchronic view of the mirror image of literature. Thousands of things are in different shapes, and countle