A very good photo but it is also a dream target for any Gunner with guided or even cluster ammunition.
Dispersal is the need of the day. While this Medium Combined Arms Battalion Commander has adequately displayed his refueling capabilities, any worthy Commander would sack him for breaking basic dispersal tactics
I don't think it needs to be said that in actual conflict they wouldn't be refuelling in that manner, in the same way that in wartime they wouldn't be aggregating so many ZBD05 family amphibious vehicles on a single beach, or so many PCL-181 SPHs together in such proximity either (see both pics below).
But for purposes of certain peacetime exercises if you are preparing for certain specific drills, it is perfectly reasonable.