The System was continuously farming monsters, but Fang Ning did not play his games or read webnovels. He was spacing out staring the System Map.
After a while, the System noticed Fang Ning's lull in activity, and that he had been out of it for a long time.
Because of the 'meltdown notification' it had gotten earlier, it was worried its mentally-vulnerable Host may have another episode again, so it asked, "What are you doing staring at the System Map? Did you discover a hidden monster?"
Fang Ning was startled by the System's question and was a little agitated, "With my cultivation, I can discover hidden monster? I'm ruminating on an important question."
"Good to know you're doing fine. Keep up the thinking, I'm going back to farm."