Hi I wonder if we will qualify for 72 hours free transit?

We arrive in Guangzhou at 5pm and have a hotel booked for the night, we then fly out the next morning at 9am. Will we be covered for the 72 hour visa if we need to stop off in Guangzhou on our return flight back to Australia 4 weeks later?

Our return flight will be from Amsterdam to Guangzhou to Brisbane. With around a 9 and a half hour stop over in Guangzhou?