Guangzhou for 72 hours. Can we get the 72 hour visa?

My family and I will be in Macau late March. We would like to travel Macau to Guangzhou on 20 March ( by land) and then Guangzhou to Hong Kong on 23 March (by land).

We gave a flight on the 24 March from Hong Kong to Manila. We are all Australian citizens.

Thanks
Shaun