I went to China for the first time three weeks ago and was very surprised by the way they serve wine and cognac...
Actually, whereas you are served very little wine (tenth of the glass) when you order some (even chinese so-called "wine"), if you order some cognac, you will have a big full glass !
Interestingly enough, my flight back was being operated by China Southwest Airlines with an Air France codeshare... After being dispointed by the service onboard, I have been pleased by the fact that they have the same habits than in inland China concerning cognac : I was in business class and they served me very big glasses of cognac (with ice until I asked to remove it !) just as it was orange juice...
Despite the less confortable seats, I finally slept as well as in Air France planes