I'm not getting what would be so great about 3D printing solar panels at all - are you saying that 3D printing electronics will become as cheap as producing in bulk? That kind of seems unlikely to me.
Or are you using the words 3D printing to mean that producing things in general will become much much cheaper? If so what about the resources required or are they not as big a part of the cost as I think?
There's a much simpler explanation: The tests came pre-graded and QQ just cast a spell to reveal the invisible grades and ignored all the answers.
Did it, that was fun! Can't wait for the results.