A Chinese historical film about Japan’s wartime atrocities has drawn criticism not for its subject matter, but over what many viewers have described as a clumsy portrayal of one of the darkest chapters of World War II. 731 – a drama centred on the Imperial Japanese Army’s notorious biological warfare unit that conducted experiments on Chinese civilians under the guise of disease prevention – premiered on September 18 to coincide with the anniversary of the 1931 Mukden Incident, the false-flag...