Hi guys my apologies if this is the wrong place to ask.

I'm arriving at HKG off the KTM-HKG KA flight in J scheduled to be in at 4:30 am but most likely will get in early. I have a 13 hour layover so I would love to hit the city. My issue is arrivals lounge is closed. Luggage storage is closed. Airport express is closed. So what are we supposed to do? Sit around arrivals?

I wanted to maybe go airside and get a bite to eat but from reading other threads it seems going back to arrivals is a hassle if not against the rules in general.