1) If you dislike eating Chinese bread, you can slice steamed bread and toast it. IMO it's tastier, and sugar-free. Toasters can be bought here in China retailing at 200 RMB or so. As sliced steamed bread varies in how long it has to be toasted to become brown, look after your toaster by unplugging it from the mains socket/adaptor once your toast is ready rather than by forcing up the two toasting trays manually.

2) For those who like eating cheese, but resent paying the high prices here of said product, you can try bean curd as a cheese substitute. It must be healthier than most cheeses - bean curd contains no animal fat There are two kinds that I can recommend. Both are sold in small jars:
i) white bean curd for those who prefer cheese that is mild or slightly strong.
ii) smelly bean curd for those who prefer strong cheese.

3) There is also a bean curd in a red sauce sold in a big jar as well as in small jars. The big jars cost around 20 RMB, but aren't available at supermarkets. Some street markets have them. A jar lasts me a month. Very good value indeed!

4) As for jam/marmalade, the small jars available @ around 5 RMB contain little fruit/orange peel and too much sugar. The small jars around 9 RMB contain much better quality jam/marmalade.

Finally, something else to be aware of:

If you wish to convert foreign currency into RMB, go downtown to one of the major branches of the Bank of China, but not at weekends. Opening hours are likely to be from 8.30 am until 6 pm, but winter opening hours will probably be somewhat different. Bank staff dealing with foreign currency aren't available during lunchtime, noon - 1430 hrs. Remember to take your passport and your Residence Permit with you.