The books on Dangdang were all genuine. Dangdang was a well-known online bookstore with a wide range of books and high-quality products. Generally speaking, the books bought on Dangdang were genuine because Dangdang was a shop that cooperated with major publishing houses to order products directly from the publishing houses and then sell them. However, there were some things to take note of when buying books. If the price of the books purchased was significantly lower than other channels and the quality of the books was not guaranteed, then these books were likely to be pirated. Therefore, when purchasing books, it is recommended to choose formal sales channels such as Dangdang, Jingdong, etc. to ensure that the books purchased are genuine. In addition, if you find that the purchased books have quality problems or copyright problems, you can also contact Dangdang customer service to defend your rights.