What is the name of the song used in Sister Rong's Darkroom March?

Orpheus Overture, a World Famous Music

The original name of orchestral music is Overture of Orflo in Hell, which was composed in 1858 and premiered in Paris in the same year.

Oflo is a famous poet and singer in Greek mythology. His singing can make the beast bow and the stubborn stone nod. When he went to hell to find his dead wife Eurydice, he sang all the way, touched hades and the afterlife, and promised to bring Eurydice back to earth. But when Mr Flo approached the ground, he forgot Hades' advice and looked back at his wife, which brought her back to the underworld. Mr Flo was so sad that he decided not to get married for life.

Offenbach (18 19- 1880). French composer, one of the founders of classical operetta. His masterpieces include the operetta Oflo in Hell, Beautiful Helen, The Duchess of Groztan and the romantic opera The Story of Hoffman. He was once praised as "endowed with endless melodies", and his bright rhythm and elegant orchestration are also unique. His operetta is lively and interesting, boldly adopting various songs, dance music, serenades and marches at that time. This kind of music is easy to understand and is still deeply loved today.