I am looking for some useful data specific from Shanghai City(since i
know that you are now at SH i suppose?)
regarding to 
1)food industry. ie number of restaurant
2)population, population density, class income.

Okay Fons, that's it for this stage, my research on the industry is
not yet done, so i will come back for more, see you later and heard
from you soon.

good luck with your search :)