The summary:

• Temporary graduate and skilled workers will be offered an additional five years of work rights in Australia on top of the time they’ve already been in Australia, with a pathway to permanent residency at the end of that period.
• Students will be eligible for a five year graduate visa from the conclusion of their studies, with a pathway to permanent residency at the end of that period. 
• Future Hong Kong applicants for temporary skilled visas will be provided with a five year visa, based on meeting the updated skills lists and Labour Market Testing requirements.
• Existing arrangement will continue to apply for those applicants who study and work in regional areas to help address skills shortages in those areas, with pathways to permanent residency after 3 years.

Source: MORRISON-and-TUDGE-Joint-Statement----Hong-Kong.pdf