Are you talking about the dance song when two patriotic youths are being chased by the Japanese and Yi Ping makes them dance in disguise in order to save them? That's the concluding part of German composer Offenbach's Orfeo Overture from Hell, also known as the Concertino!
Here's the Orfeo Overture from Hell, performed by the Chinese Symphony Orchestra, hope it's what you're looking for:/v_show/id_XOTYxNzI3ODg=.html