A paragraph:
1. Tonality: A paragraph uses C major and adopts a three-step formula.
2. Rhythm: A section adopts the rhythm of two beats, which has certain regularity, and the rhythm of the whole piece is very obvious, which is the basis of its cheerful rhythm.
3. Melody: The theme song in paragraph A is simple, fresh and lively, which plays a picturesque role in catching butterflies and picking tea.
4. Harmony: Harmony uses some simple changes, showing the characteristics of harmonious and clear pitch.
paragraph b:
1. tonality: the original tune of paragraph b is in c major, and then it is changed to d major, and a Ziwei style is used to enhance the fluency of the melody.
2. Rhythm: Section B is dominated by four-beat rhythm, which is more free than Section A, showing a more soothing feeling.
3. Melody: Compared with paragraph A, the melody in paragraph B is more beautiful, which plays the role of painting mountains and rivers, making the music more mobile and the melody broader.
4. Harmony: The harmony in paragraph B is rich and complex, which strengthens the rhythm.
The whole piece adopts the traditional form of AB section, in which A section is short and fresh, while B section is relatively longer and more complicated. The simple and distinct melody complements the fresh and lively rhythm, and the smooth melody changes constantly throughout the whole piece, gradually enhancing the sense of rhythm and dynamic contrast of the piece.