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Acclaimed director Christopher Nolan's new film "Oppenheimer" hit cinema screens across the Chinese mainland on August 30. Shot and finished entirely on film, it tells the story of the scientist who invented the atomic bomb. Ahead of its official release in China, Nolan received an interview in Shanghai, during which he talked about the techniques used in the filming, set building, music and the acting in the movie that has so far grossed nearly $800 million at cinema box offices worldwide.