Skip silk market and head straight to zoo market (aka, the DWY), a warren of buildings packed with fashion wholesalers, across the street from the Beijing Zoo. Hardscrabble entrepreneurs from across China descend upon this fashion mecca and leave with garbage bags full of loot. You'll need a keen eye to pick out winners. No need to bargain here, prices are so low (though posing as a big-time wholesaler might garner a small discount). Avoid weekends; shops close at 4pm
This tip has the address "across from the Beijing Zoo"