Originally Posted by JackR
You will not go to domestic gate on your own.
You will leave from an international gate to HKT either direct to plane or by bus.
I did an international to domestic transit a few weeks ago and was allowed to make the trip alone. Well, I had my TG F escort for part of it, but we parted ways before getting to the gate.
IIRC there was a checkpoint between the international and domestic terminals where my BP was checked and I was tagged (literally) as an international passenger. I was then allowed to walk to the gate (A6 IIRC), go through security, and board the plane. There were a number of other international passengers doing the same thing.