At present, the mainstream book platforms that issue book cards are Dangdang, JD.COM, Guandian.com, Wenxuan.com and offline Xinhua Bookstore.
According to my personal experience, I feel that the book card of Xinhua Bookstore is of little value, the price is not favorable, and there are not many books in the store, so there is nothing to choose from.
If you buy books regularly, you don't need to buy documentary evidence. It's really cheap when JD.COM and Dangdang engage in activities.
If the unit buys the library card, it will close the store. Com, the most suitable for group buying.
If you don't know, read the article yourself: comparison of advantages and disadvantages of buying a book card.
-