Aquis,
The 9 hour sector time is only included under Table A ... the Acclimatised table. However, under Table B there is no such caveat. Returning to HKG from DXB or RUH you will be unacclimatised and operating under Table B. Thus you can fly a 10 hour scheduled sector trip that can end up in an FDP of 13 hours following a 2 hr odd delay on the ground. And all of this could be happening through the night time.