HKG seems is fairly expensive on this deal - random dates in April are coming in at HKD18,000+
SIN appears cheapest, around $100 less than BKK this time around (but I've only searched random dates).
You can expect full flat beds on long-hauls*, with trolley service for meals (mix and match your choice of protein and vegetables from the wide selection available). For the shorter flights from Asia, you could end up with a long-haul, old-style long haul, or smaller A320. The A320 will have standard US/AU domestic business class seating.
*there may be one or two old-style configured long-haulers left. They are recliner seats with an almost horizontal leg rest and deep recline. I find them more comfortable than angled lie-flats (you don't slide down), but no where near as comfortable as full flat of course.