"Washing Cai Xin" is a Hunan folk song. It was originally a popular life ditty in Hunan. It was later absorbed into the local Flower Drum Opera and became a classic aria of Flower Drum Opera. The language of this song is very local flavor, the whole song is short and concise, the melody is bright, and the rhythm is jumping and joyful. Judging from the structure of the song, this is a neat and simple variation, using the folk feather mode.