Auld Lang Syne, also known as Good Old Days, is a Scottish folk song written by robert burns, the greatest peasant poet in Scotland in the18th century. In the 1940s, the American film Broken Blue Bridge took this song as the theme song. The titles of Auld Lang Syne or Bon voyage and Auld Lang Syne were based on a simple pentatonic scale, and the song is now in 4/4 beat. The first sentence of the song begins with a steady rhythm and a smooth melody, which expresses the lingering and sincere feelings for friends and gives people a deep impression. The second sentence further expressed the inner excitement. The musical form of the song is a two-part plastic structure. All four phrases are weak, similar to China's effect of "starting, inheriting, turning and combining". They are closely linked sentence by sentence, ups and downs. The first and third tunes of music go up, like questions; The next tune goes on like a sentence. This question and answer seems to be saying goodbye to each other and telling each other. The simple melody of the song reveals the sincere friendship and attachment between friends, and repeated singing has a feeling of emotion and tears.