Hi, let me try to answer some of your questions:
For A: In China, a situation for buying cell phone is the similar with what you have in Canada and you can find some tele companies or in department stores such as Fido, Motorola, Samsung or blackberry, Microsoft, etc.
B: Try to connect your local expats to find out where you can go or whom you could go with.
C: I don't know which city you will stay but in general you can enjoy your local food supermarkets, restaurants or food stores. If the city you will stay is a major city you would have a lot of opportunities to find Western style eateries or stores.
D: Connect more people somebody would like know you or teach you.
Most importantly try to connect or go with your colleagues or your staff to get more info.
All the best!
