yarn stores in Beijing?

[joe_doufu]

Does anybody have any info on yarn stores in Beijing? I was in the world trade center (guo mao) shopping mall yesterday and saw a small one, but it was some expensive italian company selling only their own brand... certainly not the type of LYS a beginner like me needs. I'm looking for a place that has a big selection, relatively low prices on at least some items, and offers lessons or at least advice.