In this confusing world and sad age, deception is the best way to live. Deceive classmates, deceive teachers, deceive parents, pedestrians, passers-by, and strangers. People build higher and higher walls in their hearts, locking themselves tightly inside, looking at the four corners of the sky directly above, until time takes away the years, lying quietly on the cold wooden board, with eyes closed tightly, but unable to open them again, what kind of loneliness is that.