The word "set each other off into interest" is usually used to describe that two or more things set each other off and produce better results. In this case, umbrella, snow and music can set off each other to form a beautiful and moving picture or scene, which makes people feel a unique charm and artistic conception. For example, in a snowfield in Zhang Mingliang, a person is holding an umbrella and listening to beautiful music. The whole scene gives people a fresh, beautiful and quiet feeling, that is, the umbrella, snow and music set each other off.