At the intersection of Renmin East Road and Beijing Road, there is a big Xinhua Bookstore with many kinds of books and a good environment. If you have a card, you sometimes get a discount.
There is a Xinhua Bookstore in Nanping Street, which is very big.
There is a Xinzhi Bookstore on the third floor of Trust-Mart at the intersection of Renmin East Road and Dongfeng East Road, with a good environment.