China has announced production curbs in its strategic non-ferrous metals sector, the latest step in Beijing’s drive to rein in cutthroat competition and boost industrial efficiency.In a new action plan the Ministry of Industry and Information Technology (MIIT) has projected output growth of 1.5 per cent for primary non-ferrous metals this year, down from 4.3 per cent last year.The initiative expands Beijing’s campaign against “involution”, or neijuan in Chinese – a self-defeating cycle of...