going to shenzen february 2013

hi friends in shenzen / guangzhou.!.. i will go to shenzen on 2 february 2013 and back 5 february, for vacation.
would like to go to guangzhou after from shenzen. i'm looking for friends, who can give me some information about shenzen or guangzhou. or maybe being my friends to go around the city.
probably, i would like to visit groceries market in shenzen or guangzhou, would like to see, if possible to buy for bussines in indonesia. thanks/