Final answer:
The Emperor burned and banned certain books and executed scholars who talked about them, in accordance with Legalist doctrine.
Step-by-step explanation:
The Emperor, in accordance with the Legalist doctrine, limited free discussion and outlawed certain books. At the suggestion of his advisor Li Si, the First Emperor required privately-held copies of certain books to be burned. Scholars who continued to talk about these books, especially to criticize the Emperor, would be executed. Li Si exempted from destruction the historical annals of Qin, agricultural manuals, books on divination, and medicine. The outlawed books were, however, carefully preserved in the imperial library for the Emperor to consult and for students to learn from the official scholars.