With the highest roof on earth, the sleek Shanghai World Finance Center stands in the city that has overtaken New York and Chicago as skyscraper capital of the world. Setting the standard for a new generation of supertall skyscrapers, this Japanese-developed tower, built on Chinese land, also symbolises a new era in relations between the two previously hostile countries after Japan's violent invasion of China in the 1930s. Presented by Matt Berman.