Online bookstores referred to bookstores that provided online sales and delivery services through the Internet platform. The following are some well-known online bookstores: Amazon: One of the world's largest online bookstores offers a wide range of books, music, movies, and home products. Taobao: China's leading online shopping platform has many online bookstores, including the National Library of China Bookstore, Beijing Book Building Bookstore, etc. 3.jdcom: One of the largest online resellers in China also owns many online bookstores, including the National Library of China Bookstore and the Beijing Book Building Bookstore. Amazoncom: One of the leading online bookstores in the United States offers a wide range of books, household items, electronics, music, and other products. Doubancom: China's leading literary social platform, its bookstore section provides online purchase and reading of many literature, art, humanities and social sciences books. In addition to the well-known online bookstores mentioned above, there are many other online bookstores such as XinaAiwen Bookstore, Jianshu Bookstore, Jianshu Literature Museum, etc. They provide various types of books to meet the different needs of readers.