Hi, Im going to shanghai and beijing after one week and I desperately need your answer as soon as possible.
In which region should I stay in shanghai and be close to the shopping area and the expo and beside the railway or train station?
2nd thing where can I buy cheap electronic stuff and home appliances? I want to buy the robot vaccuum cleaner, TV receiver and the head massage.
how can i buy tickets to the expo? and will it be cheap to shop for electronics in the expo?
Please if you can give me all the cheap markets in which i can buy clothes and table clothing as well as electronics. is it possible to shop for all of these in one place?is it cheaper to shop for electronics in shanghai or beijing?
Last thing please can you advise me what are the best sightseeying places in shanghai?

Thanks a lot in advance and please answer me as soon as possible.