Where to buy quality brand copies in Beijing and Guangzhou?

Hello everyone
I have some questions:
Which city is better for buying high quality brand copies (cloths, shoes, jewelry), Beijing or Guangzhou..
Why not one but another?
Can you advice me some more places? (please give me the names of Citys, wholesale markets and their addresses)

(p.s. i was in Beijing and the best place i found was wholesale near zoo)

Hope to get answers from you