A Chinese construction company is claiming to be the world’s fastest builder after erecting a 57-storey skyscraper in 19 working days in central China. The company now has ambitions to assemble the world’s tallest skyscraper, at 220 floors, in only three months. Modular methods have been used for high-rise apartment blocks elsewhere, including in Britain and the US. Some critics say the method could lead to cityscapes with overly uniform architecture.