Due to the rapid development of communication networks, the number of smart phone users in China is increasing at an astonishing speed in recent years, which has greatly changed the way many people read. They now often read news and articles on their smart phones instead of on traditional newspapers. The development of a large number of mobile apps enables people to read novels and other literary works on their phones. Therefore, the sale of paper books has been affected. But according to the survey, despite the steady growth of the smart phone reading market, more than half of adults still prefer to read printed books.