Since ancient times, especially in recent years, there is no shortage of second-hand books in the market. Because with the rapid development of book printing and publishing, the number of books published is increasing, and many books that can't be sold or the owners think are worthless have entered the market through various channels. Moreover, the market does have a considerable demand for it, especially the online second-hand book transaction has developed the fastest. With more and more users of WeChat, more and more enterprises and entrepreneurial teams buy and sell second-hand books through WeChat Mall, such as the official account of WeChat "Book Spectrum Mall".