The audience watches the Beethoven's Fidelio in the outfield area during the Film Festival at Vienna's Rathausplatz, Austria, on July 4, 2020. This year's Film Festival at Vienna's Rathausplatz opened on Saturday.

The audience watches the Beethoven's Fidelio in separate boxes during the Film Festival at Vienna's Rathausplatz, Austria, on July 4, 2020. This year's Film Festival at Vienna's Rathausplatz opened on Saturday.

The audience watches the Beethoven's Fidelio in separate boxes during the Film Festival at Vienna's Rathausplatz, Austria, on July 4, 2020. This year's Film Festival at Vienna's Rathausplatz opened on Saturday.

The audience watches the Beethoven's Fidelio in separate boxes during the Film Festival at Vienna's Rathausplatz, Austria, on July 4, 2020. This year's Film Festival at Vienna's Rathausplatz opened on Saturday.

The audience watches the Beethoven's Fidelio in the outfield area during the Film Festival at Vienna's Rathausplatz, Austria, on July 4, 2020. This year's Film Festival at Vienna's Rathausplatz opened on Saturday.

The audience watches the Beethoven's Fidelio in the outfield area during the Film Festival at Vienna's Rathausplatz, Austria, on July 4, 2020. This year's Film Festival at Vienna's Rathausplatz opened on Saturday.

The audience watches the Beethoven's Fidelio in separate boxes during the Film Festival at Vienna's Rathausplatz, Austria, on July 4, 2020. This year's Film Festival at Vienna's Rathausplatz opened on Saturday. (Photos: Xinhua)