Can I apply in advance for a 72hr transit visa before leaving my home country.

We are planning a 72hr stopover in Guangzhou China on our way to Amsterdam. We would like to have a hotel booking in place along with any selected sightseeing tours before departing Australia rather than try to locate a suitable hotel etc. on arrival at the airport. With the correct documentation can you apply in advance before leaving Australia. Alternatively is there any risk in making bookings in advance before visiting the Transit Service Counter at Guangzhou Airport.