Shortly after 9am the neighbourhood care centre for the elderly shuffles to life. One man belts out a folk song. A centenarian sits by his Chinese chessboard, awaiting an opponent. A virtual-reality machine, which lets users experience such exotic adventures as grocery shopping and taking the subway, sits unused in the corner. A bigger attraction is the morning exercise routine—a couple of dozen people limbering up their creaky joints. They are the leading edge of China’s rapid ageing, a trend that is already starting to constrain its economic potential. Since the care centre opened half a year ago in Changning, in central Shanghai, more than 12,000 elderly people from the area have passed through its doors. The city launched these centres in 2014, combining health clinics, drop-in facilities and old-people’s homes. It plans to have 400 by 2022. “We can’t wait. We’ve got to do everything in our ability to build these now,” says Peng Yanli, a community . . . . read more in The Economist