Shanghai, China (AFP) by Matthew WALSH and Michael ZHANG Mobile apps and state media websites turned black-and-white, flags on some government buildings in Beijing were at half-mast, and flowers were laid as China on Thursday mourned the death of former leader Jiang Zemin. State media said Jiang had died of leukaemia and multiple organ failure in Shanghai on Wednesday at the age of 96 after all medical treatments failed, and that funeral preparations had begun. […]