The books in Zhongguancun Book Building are relatively complete, and the general books of members are 20% off.
The Roof of the World Bookstore takes the fashion route with few discounts.
Haidian Bookstore, as you said, has a bookstall and a bookstall. Each booth is run by individuals, so the discount is different, depending on what books you buy. Generally, textbooks are 20% to 10%, and some are cheaper.
Location:
Zhongguancun Book Building: at the southwest corner of Haidian Bridge, take bus express 106, 808, 26, 944 and 302. . . Everybody's here. Get off at Haidian Qiaobei or Seismological Bureau Station, and you will see it. The building says "Left Bank Commune", which may be the name of the building. Zhongguancun Book Building is in that building.
Haidian Book City: The Haohai Building mentioned on the first floor is located in Haidian Book City, which is separated from Zhongguancun Book Building by East Road. There is a Dida Garden Hotel, followed by Haidian Book City, which is obviously easy to find.
Roof of the world: although it is not necessary to go, it is very close. If you want to go, it is in the east of Haidian Book City, next to it, and the building is also obvious.
In fact, the east-west directions of these three positions are basically on a straight line, next to each other, and you can find them when you arrive ~ ~