The Shenzhen airlines lounge at SZX is also the nicest lounge I've visited in China. The airport is wonderful until you realize you need to pay 2 RMB for a 15 minute bus ride to a subway station to get into town. Once they get that fixed I'll go out on a limb and say it's the best airport in China facilities wise. I don't mind long walks but I imagine they are a bummer for lots of travelers.