In​ 2015 Fan Jianchuan was invited by the Chongqing government to open a new branch of his eponymous museum chain just outside the vast city. The original, the Jianchuan Museum Cluster in Anren, a small town of some 80,000 residents in south-west China, is the largest private museum in the country: it contains eight million items spread across 29 separate museum buildings covering 82 acres,...