The sound of the willow flute and the spring in the world are not poems. The sound of the willow flute means that when the spring breeze blows, everything revives, and the vibrant spring appears in front of the world. From the article "Spring Breeze". Part of the excerpt: When the willow flute sounds, the world springs, and the children rush to break willows, make willow whistles, and then compete by playing the willow flute and trumpet. The sound of the flute is loud or delicate, or rough and high-pitched, and the spring is filled with greenery.