Fu Sheng will probably never forget that winter morning in his life. Outside the window, there was heavy snowfall, and at a glance, it was impossible to tell the difference between sky and earth. The surface of the river is frozen, but there seems to be rising mist. All the scenery brings an almost sad atmosphere. She was facing the computer, and the man's incredibly gentle voice came from the inferior headphones. He said: "I will spend my whole life meeting you, not for memories, only for promises."