Are you asking about the song "Greetings"? It didn't complete this song, only the second part (bass part) of the melody, which was one less. The following song "The Wind Band is Playing" was completed, and the first part was completed by one person. , play with both hands in the high-pitched area, the second part is completed by another person, and play with both hands in the low-pitched area. If you are still unclear, you can ask additional questions.