Although growing that much at once was a somewhat unfamiliar feeling, the growth itself was quite familiar. Wasn't this just feedback?
Something Di Tou had been worrying about a bit was whether or whether not he could still cultivate by cleaning, if he couldn't, was he just supposed to figure out how to cultivate normally all of a sudden? Of course, it wasn't that he didn't know how to cultivate. After living in this world for so long, how could he not figure out how to cultivate?
If nothing else, living in the Academy for so long, where cultivation techniques were plentiful as oats, he would have picked something up by the simple aspect of being there.
The issue was that cultivation was slow, far far slower than his growth through the… Through what he thought had been the Mandate but was now thinking was through the power of the Voice.