"The Wedding Vow" is a duet love song, which uses different parts of bananas and the relationship between bees and honey to express the sweet and sincere feelings of a pair of lovers who love each other. Because metaphors are all taken from common things in life, they can also improve the singing degree of works in simplicity. Musically, the Wedding Vow, which originated from Lusheng melody with unique Lahu melody, also strengthened the dramatic effect of the song in more rhythm changes because of the use of 3/8 beats, making the two singers more vivid and the emotional expression in the song more lively.

The singers of the song "Wedding Vows" in the movie are the golden partners of the duet, Zhang Zhenfu and Geng Lianfeng. Zhang Zhenfu's voice is loud and full, and Geng Lianfeng's voice is gentle and simple. The biggest feature of their cooperation is that they don't win purely with the extreme characteristics of technical treble and penetration, but inject rich emotions into euphemistic voices, which infinitely enhances the aftertaste of songs. Therefore, they were considered as the best duet group in China at that time.