Visa Requirements for Hong Kong to Guangzhou and back again

We are a family of Australian citizens wishing to visit Hong Kong for 3 days and then spend around 8 days in Guangzhou before returning to Hong Kong for our return flight back to Australia. I understand that we need to apply for a tourist visa for entry into China. As we are independent travellers, we have yet to book our accommodation in Guangzhou. I am currently completing the Visa Application and noted that it wants details of where we will be staying. Does anyone know if this is going to cause problems?