So, I can only say that there's probably a part of human nature that's a bit base. Qiao Yu felt that he wasn't able to completely stay away from it either, and the thought was quite scary.
Muttering to himself about how his own mentor was heartless, he stepped out of the teaching building, only to suddenly see the senior sister who had left earlier standing by the flower bed outside the building.
Upon seeing him, she came straight over, greeted him warmly and confidently: "Hello, Qiao Yu, nice to see you again."
Qiao Yu looked around but didn't see any sign of Professor Lu. Curiously, he asked, "Has Professor Lu already left?"
"Yes, the boss left first. Before leaving, the boss told me that if I want to learn real stuff, I've got to have thick skin, so he asked me to wait here for you to have a chat."
Zhang Xiao cheerfully explained.
