Confucius and Second-hand Book Street. Look for books in Pinduoduo and put them on the platform of Confucius and Secondhand Book Street. If someone places an order, you can make a difference. The positioning of these two platforms is second-hand books. Second-hand Book Street is the leading second-hand book trading website in China, and Confucius Second-hand Book Network is a professional second-hand book trading platform in China, which brings together 13000 online bookstores nationwide.