what are the documents required for work permit visa in china and are you people on holidays in eid

hello sir
i,m working as docter in shangai i have to come to pakistan on 27 october 2012 to change my visa status from dpendent to work .can you people tell me which documents i need to take to you and also how many days it take in the process of change of it
are you on leave in eid holidays in pakistan?