detailed itinerary

The application form asks for detailed itinerary and addresses of where we will be staying in China. Whilst we have return flights and first and last few nights accommodation booked, we were hoping to book accommodation as we travel, as we don't know how long we wish to stay in each province. We are in China total one month, entry and exit via Guangzhou. Do we need to have accommodation booked and confirmed for entire stay before we apply for our visas? Any advice on this appreciated.