Korey's pic arranging barrel covers: he is holding a barrel cover with #MontBlanc on it.
So my thought is he's moving every letters to the other side because that hashtag barrel needs to be place at the end.
And plus, the barrels in the middle showed D , D and S Which means Dubai, Denpasar, Shenzhen?
So in that case the barrels would be 3 cities at a time.
Synchronized mountaineering may be one member coes vertical and one goes horizontal