If the OP desires, I'd be happy to ship him some Chinese wine, but my general feeling is that I've had very few Chinese (red) wines that I've thought were any better than mid-range bottles available at Whole Foods.

Mixing expensive wine with Sprite really quite common, especially at KTVs. A friend of mine runs a restaurant in Beijing and I once asked her what she thought of 小白领 desecrating her finest wines with the Sprite thing and her response was they are free to do as they please, and that they are her best customers (i.e. in typical Chinese style, they tend to order far more dishes than they could possibly consume because they want to sample everything on the menu).

French wines are popular here (i.e. I've seen more Lafite in Beijing/Shanghai than in all other cities I've been to combined), but people seem to be more driven by exclusivity than quality. It's a bit of a dream world for sellers of luxury goods.