Do I quality for 144 hours visa free?

1. My itinerary is Sydney - Shanghai (stop over for 5 days) - Tokyo (stop over for 5 days) - Shanghai (airport transit 2-5 hours) back to Sydney? Do I qualify for 144 hours free visa?

2. On the way back from Tokyo to Shanghai, do I qualify for another 144 hours for the second time before I fly back to Sydney? I just want to know if 144 hours visa free is only applicable for 1 way traffic only.

Thanks.

Regards,
MT