The mathematical elements in Song Yun include digital reading hall, children's reading hall and Wenchuang life house. According to relevant public information, this book fair takes Ningbo International Convention and Exhibition Center as the main venue, and sets up offline and online sub-venues in Xinhua Bookstore, featured bookstores, farmer's bookstores and online bookstores of e-commerce platforms such as Tmall, JD.COM and WeChat.