Regarding 72-hour Free Transit in Guangzhou

I am going to flight from Korea to Sydney via GZ and then back to the Korea through GZ from Melbourne after 2 weeks. I am going to flight from the Korea and arriving at GZ on Saturday at 12:05 PM . Then I am leaving on Monday at 09:00 PM (less then 72 hours based on 00:00 the next day of my entry date not arriving time) to Sydney. After 2 weeks, I am going to flying back to the Korea from Melbourne via GZ. Am I eligible for the 72-hour Free Transit in GZ when I go to Sydney from Korea?