One aircraft looks like it driving down airport road! Looks like a mess, what's up?
It's Dragonair, don't worry...
Looks like the gaggle is starting to thin out finally.
Must have been some weather earlier I would guess.
Some of these international hubs have a late night rush hour for better departure performance in cooler temperatures and to connect with the Europe and U.S. international flows. Dubai, for example, always seems to have several planes in holding at 1 am even with good weather and multiple runways.