About transit in different cities

Hi, I need to book a flight from the US to Australia, the one that I found has stop over in thE following cities: Qingdao (14hrs) PEK Beijing capital (7hrs) and Nanjing/Nanking (3hrs) I would like to know if with this itinerary I'm eligible to apply for the 72hrs free transit visa, if I'm not, which other option do I have?
Thank you so much