With the development of the Internet and the standardization of e-commerce platforms, we can buy the original books published by regular publishing houses through regular e-commerce platforms, and judge whether they are original books by looking at publishing houses, copyright pages and ISBN numbers. As a large-scale e-commerce platform, Pinduoduo also has many original books published by regular publishing houses for sale, and there are also some problems such as low price, piracy and infringement, which require consumers to choose carefully.