Before the Spring and Autumn Period and the Warring States Period, reading was only a matter for nobles. During the Spring and Autumn Period and the Warring States Period, a large number of outstanding scholars appeared, which made the reading class move down. Because of Confucius' educational thought, not only aristocrats can study, but also a group of ordinary students have entered the stage of private schools. Education has also broken the monopoly. Although it is impossible for anyone to study because of the restriction of social productive forces, it also monopolizes the knowledge of the nobility, so a group of students from poor families appeared.