Just a few random thoughts:
Great Wall red is now (barely) drinkable. It is possible to use it for a business toast and not immediately spit it up on the guest of honor. I had a little bit of it and survived, but I saw what even moderate amounts of it did to some of my co-workers, and am glad I only sipped.
Restaurant wine prices for imported wines are higher than in other parts of the world. $15 for a glass of Chateau St. Michelle Riesling...$18 for a glass of Rosemount Estate Shiraz...etc.
The cultural bias towards red wines means repeatedly lousy matches with the food. The food is mostly white wine friendly. When not at a business dinner I drank beer.
Counterfeit wines are for sale everywhere. I saw clearly bogus Pavie, Leoville Poyferre and others (no Lafite). I was especially amused at the Pavie with the monotone labels (Pavie has a multi colored label) and the Leoville Las Cases where Leoville was short an 'l'.
And virtually all the wines are pre-cooked for you. Bright, hot lights shine on the fake trophy bottles.
a true wine culture in China is going to be a while.
There behind the glass lies a real blade of grass. Be careful as you pass. Move along. Move along.