'Exhalation' is a collection of short stories by American writer Ted Chiang. It contains nine stories exploring such issues as humankind's place in the universe, the nature of humanity, bioethics, virtual reality, free will and determinism, time travel, and the uses of robotic forms of A.I. The Chinese version book cover has a big triangle in the middle, so I use a triangle as the symbol of the book. I combine the universe and the natural scene in this video so that it conveys the right information as its content. Hope you like it.