Qin dynasty: taking officials as teachers, private learning is strictly prohibited. The educational system in Qin Dynasty originated from the educational thought of Legalists. In the thirty-fourth year of Qin Shihuang (2 13 BC), Prime Minister Li Si suggested burning the history books of all countries except Qin. In addition to doctoral officers, those who hide hundreds of books and discuss hundreds of theories privately should also be punished. Only practical and non-political books such as medicine, divination and tree planting can be preserved. People who want to study law can only learn from officials and master it in practice. Implement the education system of "teaching according to law and taking officials as teachers". Taking officials as teachers means that there is no one with writing ability in the whole society except literary officials. People can only learn from government officials if they want to learn to write. Government officials assume the responsibilities of educational administrators and teachers. In order to control public opinion and muzzle ideas.