The white and vast ice and snow world, the quiet reeds, only a few wild ducks that are not afraid of the cold leisurely shuttle through the reeds. As if alarmed by the unusual sound, the wild duck looked at the sound, and then as if extremely frightened, it quickly "quacked" and swam away several times, and in the blink of an eye, only the shallow ripples in the water were left to swing towards the shore in circles and circles.