"Ah Goodbye, Friend" [1] The foreign song is called Bella ciao ("Goodbye, Girl"), and the original singer is Yves Montand. This song is an Italian folk song that is widely circulated and was later quoted as the theme song of the movie "The Bridge". The sound of the song is euphemistic, continuous, and graceful. It is such a bold and magnificent song. This song expresses the feeling of the guerrillas leaving their hometown to fight the invaders, praises the fearless heroism of the revolutionary guerrillas, and vividly shows the revolutionary guerrillas' love for their hometown and their spirit of disregarding death.