If you want to buy discounted reference books, you can go to Haidian Book City, where reference books can basically be discounted by 20%. Take bus No.47 or No.332 and get off at Haidian Bridge, which is in the southeast corner of the bridge.

As for the publishing house of reference books, I know that the Commercial Press is located in the north of Wangfujing, east of Deng Shi, where there is their bookstore, but there is no discount, the original price. There is also foreign languages press, which sells foreign language reference books. Take 1 12 or11at Xiwai South Street to get there. There is also a bookstore at the door, but there is no discount.