Ancient teachers usually taught princes from Confucian classics, such as the Great Learning and The Doctrine of the Mean. These classics are important classics of Confucianism and the foundation of ancient education. Tai Fu will teach the princes the moral norms and philosophy of life in these classics, help them pay attention to moral cultivation and etiquette, and learn to abide by the laws and regulations of the country and the general plan of governing the country. In addition, Tai Fu will also teach national policies and government affairs to help the prince master the basic ideas and methods of governing the country. By studying Confucian classics, the prince can gain a complete ideological system and lay a solid foundation for becoming a perfect monarch.