The Cinema of China is one of three distinct historical threads of Chinese-language cinema together with the Cinema of Hong Kong and the Cinema of Taiwan. Cinema was introduced in China in 1896 and the first Chinese film, The Battle of Dingjunshan, was made in 1905, with the film industry being centered on Shanghai in the first decades. The first sound film, Sing-Song Girl Red Peony, using the sound-on-disc technology, was made in 1931. The 1930s, considered the first "golden period" of Chinese cinema, saw the advent of the Leftist cinematic movement and the dispute between Nationalists and Communists was reflected in the films produced. After the Japanese invasion of China and the occupation of Shanghai, the industry in the city was severely curtailed, with filmmakers moving to Hong Kong,