I think some ancient books and classics can greatly increase people's knowledge reserve. The classics of ancient books involve all aspects, whether it is literature, science, medicine, music art and so on. These are recorded in detail, especially in the literature, and the amount of knowledge he brought to people is absolutely excellent.
Then some magazines and books. The magazine has designed various contents. It is a book about modernity, especially many contents related to modern society, which is of great help to people's experience and life.