You forgot the Su-30MKK is already capable to carry then non only on the inner wing-pylon but also under the intakes, So even if this is more a show-load and indeed a Su-30MKK, I see no reason to be sure, the J-16 can do the same. If the J-15 can, is another story!?!
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He is asking how many YJ-91s a J-16D can carry if it is carrying its full loadout of EW pods as seen at the airshow -- four pods total, two under the air intakes, and two at the underwing pylons.
In that image, the six YJ-91s would be reduced to two YJ-91s with the full loadout of four EW pods.
So the question is whether J-16D (or any other Flanker) can carry YJ-91s in the ventral positions.