I visited Shenzen with a business associate recently. He went crazy in the shops around the station buying copy I-Pads, phones and watches and announced his proud purchases to our Chinese client. The client looked at my friend as if he was crazy and said "oh no, we go to HK for our shopping - everything here is junk !"
Anyway I now have a copy I-pad, 2 phones and 3 watches I didn't need - but it was fun and they took our money with a big smile