Answer: The main melody of the violin Yuguang Qu is basically the same as the song Yuguang Qu, but the instrumental music needs to be changed in terms of harmony and other aspects based on the song. After all, it is the same song and the same instrument. There are still many differences in the music. The songs have specific content to be sung. Instrumental music needs to be re-created and adapted based on the main melody of the song to enrich the connotation of the song adapted into instrumental music.