I have discovered another place to shop for cheap clothes here in Beijing. It's quite far from the city centre but clothes are at bargain prices. The prices are a little lower than at the shopping place in front of the zoo.
The three-story building is at the north corner of the Lizeqiao Long Distance Bus station, north-east of the Lize Bridge.
After shopping, you can buy a really heavy meal at the restaurant(?) at the other end of the station (didn't get the name) for 10 kuai (one meat dish, 2 vegetable dish and 2 cups of rice). If your speak Chinese is like I do (meaning you don't), you can just go to the counter and point what you like, there's this lady who'll take your order.
To get there:
Subway Line 2 to Xizhimen (Exit D). Walk south towards the bus stop (Xizhimen Nan). Take bus number 604 and get off at Lize Qiao Dong then walk west towards until you see the long distance bus station. Lize Qiao Bus station is also the terminal station of the double-deck #2 bus that travels around the second-ring road.
By Taxi: Tell the driver to take you to Lize Qiao Chang Tu Ke Yun Zhan (丽泽桥长途客运站).