I am flying to BKK from Toronto via Anchorage for gas and then HKK, in J. When I arrive in HKK do I clear Hong Kong immigration and customs (and get the luggae and recheck etc.) or is there a passageway and lounge access that keeps you locked in from arrvial to departure gate?

All my arrival experience is USA where everyone and bags go through US and no transit lounge only stuff anymore.