We went in march 2006 on a 10 day tour. We took a nationwide credit card (as you get no charges) and some money, we had no probs. Can�t remember how much we took now.
Another tip: The chinese is food was very nice and there was plenty of it but by the end of 10 days we were sick of it. Take some snack bars, cup a soups etc���. and some chocolate��.they only have fruit (apple and orange cut up) for dessert. I love my desserts so I missed them alot.
If you have a chance to have a experience a full body Chinese massage �do it. It was about �12 when I had one, you wouldn't get one over here for that money.
Hope that helps.