Un-frikken-believable
Is that was happened? Surely, a widebody Airliner at a regular destination (not on a diversion) with a shyteload of (enroute)-alternates around should never end up in a situation like that.
Really? I don't know all the details, but with fine weather forecast at destination, no expected ATC delays and enough fuel for an alternate such as Macau, would you really divert to an enroute alternate to top up the tanks?
Even if they were running low on fuel at the end of an ULH flight and had to drop the alternate, I'd suggest it would be perfectly reasonable to continue to destination if the forecast & actual weather was fine and there were no expected delays. If you then throw in an ATC delay followed by a go-around then it is not at all surprising they had to call low fuel.
Well done to the quick thinking controller.