i suggest for round robin...
5 teams in a group...
like UEFA Cup format...
coz then each team have same home//away matches...
also for the matchweek the teams didn't have HKCM matches...
they can go out for international friendlies...
maybe...
Premier Division...10 teams...
2 groups of 5...
then top 2 teams qualify...
4 team knockout mode...
Championship...10 teams (same as Premier Division)...
1st Division...if 10 teams...same as Premier Division...
if 7 team...then directly 7 teams round robin...