Rescue opera tradition that would influence German Romantic opera and French grand opera. The most famous rescue opera is Ludwig van Beethoven's "Fidelio". "Rescue opera" was not a contemporary term. Dyneley Hussey used the term in English in 1927 as a translation of Karl M. Klob's 1913 reference to "Fidelio" as "das sogenannte Rettungs- oder Befreiungsstück" in "Die Oper von Gluck bis Wagner". David Charlton believes that rescue opera is not an authentic genre, and that the concept was coined to make what he believes is a nonexistent connection between Beethoven's work and French opera. Patrick J. Smith, on the other hand,
Unity is Strength the Second Sino-Japanese War. Unity is Strength was jointly written in June 1943 by Mu Hong, also the composer of I Love the Eighth Route Army and a major contributor to the production of the Yellow River Cantata, and Lu Su, another well known Chinese communist musician. Allegedly, the song was written in only three days after the lukewarm reception of an opera they had produced under the same name. After facing criticism that the opera ended too abruptly, the two wrote Unity is Strength as a finale act. The piece was written in a small mountain village in Shaanxi