How many 144 hour visa free stay in Shanghai is allowed in a gheiven period?

Hello,

I plan to fly from Sydney to Shanghai and stay for 5 days then fly to Japan and stay there for 2 weeks. Then fly from Japan to Shanghai and stay for 4 days then fly back to Sydney.

Are my two stays in Shanghai eligible for 144 hour visa free transit stay in Shanghai?

Thanks for you reply in advance!

Frank