The business people I have been dealing with in China for almost two decades are not like that! It has been very business like, limited to several banquets each time I go there at the most. Maybe that is why my business scope is so limited there so far
Also I have never heard anything like that from a bunch of my buddies who have been "stationing" in Beijing and Shanghai for more than 10 years. They are all married men though. Maybe that is the difference.
Anyway, I really admire your time management! Happy New Year to all!