The theme song to the movie, The March of the Volunteers, was sung by Gu Menghe and Yuan Muzhi. The song was released as an album by the Pathé Records label (which later became part of EMI in 1935). The March of the Volunteers was selected as the national anthem of the People's Republic of China in 1949. This decision was formally written into the Constitution of the People's Republic of China in March 2004.