Free books in the nine-year compulsory education stage include: Chinese books, math books, English books, political books, history books, physics books, chemistry books, geography books and biology books. These are rabbit feed books. Some books are recycled, such as healthy exercise books, beautiful books, music books, painting books and science books, which are all free. You have to spend money on all kinds of exercise books and geography and history books that are matched with free books.