Whether it's real or fake, anything you want to buy can be found here. They keep the knock-off purses hidden, and will probably offer you a "catalog" to peruse before bringing them out.
The hugest mall at Xidan surrounded by less huge malls and huge markets. Check out also the hugest bookstore in Beijing which is naturally also nearby.
Looking for Tang Dynasty decorations and souvenirs? Go to this market at Third East Ring Road. Lots of merchants selling unique Chinese wares, art pieces, and antiques. Most fun to visit on weekends.
Zhongguancun, or Zhong Guan Cun, is a technology hub in Haidian District, very well known in China, and is often referred to as "China's Silicon Valley".
Don't be fooled by the name. While the Pearl Market does sell its name-sake, it also sells just about everything else.
At the mall you've got everything from an American-like-food store, food court, apple retailer, Starbucks, Nautica, Levi's, Swarovski, Paul Smith, Valentino and many other luxury boutiques.
