Leo Yao thought he had nothing to fear from the environment ministry. Before, when its inspectors visited his cutlery factory, he says, they generated “loud thunder, little rain”. After warning him to clean up, they would, at worst, impose a negligible fine. Not so this time. In August dozens of inspectors swarmed over his workshop in Tianjin, just east of Beijing, and ordered production to be halted. His doors remain shut today. If he wants to go on making knives and forks, he has been told that he must move to more modern facilities in a less populated area.