What is the theme song of auld lang syne?

Theme song of the movie Broken Blue Bridge

Auld Lang Syne is a very famous poem. The original text was written in Scottish, meaning a long-lost day. According to local elders, Auld Lang Syne was written by robert burns, an outstanding Scottish peasant poet in the 8th century. This poem was later set to music. In addition to the original Scottish, this song has also been set as the local language in many countries, and it is widely called Auld Lang Syne in all parts of China. There are many versions of Chinese lyrics, and many people can hum the melody of songs at ordinary times.