Filling out the visa form

I've been an Au Pair in PRC before and therefore have had a previous Chinese entry permit before. In the application it asks the date and place of where my last entry permit was granted. I was already in PRC at the time since the last Chinese entry permit was granted as an extension. Do I put that it was granted in Qingdao (which is where I was living in China at the time) Also, I've renewed my passport since then and I have no Chinese entry permits in my new passport. Does this matter? I'm planning to visit my host family that I Au Paired for this year. Do I need a letter of invitation from them/ do I need their address to put on the application?
How specific does the itinerary need to be? Can I just put the city of where I'll be staying or do I need hotel or residence addresses?
Please Help ASAP!