The pitch of Duo is in the order of low-medium-high-high. Among these five phonetic symbols, Duo, Fa and Zhuo are all vowels, and their pitches decrease in sequence; La, Xi and Duo are all consonants, and their pitches increase in sequence, with Duo being the highest pitch. Duolaimifa Lasidou is generally used as a harmony in music. It can add vitality to songs, heighten emotions, and make songs more lively and interesting. It can also highlight the characteristics of music and show the characteristics of different national music cultures. , making the songs more regionally specific.