Mi Cai in the room didn't respond to me, probably really upset by my words and actions just now. I knocked on the door again and said, "If I don't enter your room, I'll throw in the cockroach I've cleaned up for you to check, to prove that I've indeed done you a favor and never perfunctory you."

Mi Cai said to me nervously, "No need to check, just take it away."

"Oh." I responded, and threw the cigarette butt wrapped in tissue paper and a half-dead cockroach out of the window.

I said to Mi Cai again, "The bathroom is now available, guaranteed no cockroaches."