There's a Swan Dance School on the 5th floor of the Activity Center on Jiangyin Road that specializes in ballet, though I'm not sure there's a level 5 class. He has several teaching points, as far as I know there is one in Hongkou District, (Baiguan Street No. 1, near Haining Road), you can first look into
Transportation Route: Jiangyin Road: Metro Line 1 to People's Square, Exit 2, walk along the city hall, the Shanghai Grand Theater, and then cross the street, along the real pot cafe and a large department store, see a small alley called Jiangyin Road into it.