1. The rhythm of Allegro is very strict, which requires the combination of the rhythm of poetry and the rhythm of music to make the poem catchy and sound very smooth.
2. The rhythm of Allegro words is diversified, including traditional poetic forms such as five-character quatrains and seven-character quatrains, as well as rhythmic forms based on word behavior, such as cross-rhyme and overlapping rhyme.
3. The rhythm of Allegro words is closely related to the content of lyrics, and rhetorical devices such as metaphor and exaggeration are often used to make the rhythm more vivid and interesting.