There were many places in Beijing that bought secondhand books, such as: Wangfujing Bookstore: Located at A31 Wangfujing Street, Dongcheng Area, Beijing City, it is a large comprehensive bookstore with many old books. 2. Capital Library: It is located at A31 Zhongguancun Street, Haidian District, Beijing City. It is a public library with many old books. 3. Confucius Old Book Network: It is an online book buying website. There are many second-hand books on it, and you can also sell or buy old books. 4. Book markets: For example, in the Dongcheng Area, Xicheng District, Chaoyang District, Fengtai District and other places in the center of Beijing City, there are many book markets where there are many second-hand book stalls where you can find some good books. Old goods markets: For example, in the Dongcheng Area, Xicheng District, Chaoyang District, Fengtai District and other places in the center of Beijing City, there are many old goods markets with a lot of old books, furniture, electronic equipment, etc. He could choose a place suitable for him to purchase old books according to his own needs and preferences.