Because of the rapid development of communication network, the number of smartphone users in China has increased at an astonishing rate in recent years, which has significantly changed the way many people read. Nowadays they often read news and articles on smartphones instead of buying traditional newspapers and periodicals. The development of numerous mobile apps has enabled people to read novels and other forms of literary works on their mobile phones. Therefore, the sales of paper books have been affected. But surveys show that though smartphone reading market has grown steadily, over half of adults still enjoy reading paper books.