A well-known photographer once said: "Photography is essentially a form of soft murder. Taking a photo is cutting out that moment in time, turning a living person into a static object. All photographs are a kind of death certificate: it once existed, but now it's gone. The moment you raise your camera, you've exited the experience of the present and become a cold predator. The clearer the photo, the heavier the sense of loss and sadness." In fact, he just wants to extreme express that you should treat living people with sincerity.