Originally Posted by christep
Yes, but that depends on the definition of "transit". The IATA definition, which most airlines stick to is <24hrs, but each airport has its own. As a previous poster said, in HKG you have to pay tax if your departure is on a different calendar day from your arrival. In principle this could only be a 45 minute transit.
That (HKG departure tax rule) makes it hard on airlines who sell date/time changeable tickets like ONE's.