According to their Press Release (which can be found HERE):
*All local time; subject to regulatory approval
"The new service is a triangular service starting from Hong Kong to Gold Coast, and continuing to Cairns enroute back to Hong Kong. Airbus A330 aircraft with 292 seats including 32 business class seats will be deployed on the route, operating on Tuesdays, Fridays, and Saturdays. Hong Kong Airlines and Gold Coast Airport today held an agreement signing ceremony in Gold Coast."
Hong Kong to Gold Coast
Every Tuesday, Friday, and Saturday
Gold Coast to Cairns
Every Wednesday, Saturday, and Sunday
Cairns to Hong Kong