Please, let's not even get into housing...I can never buy a house here. But at least rents are cheap!
Quality goods in China are expensive period. If you are in a second or third tier city, its even worse. We schedule trips to Hong Kong for shopping...we aren't the only ones also! Cars are expensive all over China as they are heavily taxed. Only food could be considered a bit cheaper, but you have to avoid the low end completely over food safety concerns (e.g. gutter oil).
All in all, I would save money by moving back to Seattle, I think. More to pay in rent, but houses are cheaper to buy, food is more expensive, but groceries would be cheaper. Taxis are much more expensive, but I could actually own my own car and park it legally without paying a whole bunch of money.