China has ordered central government agencies and state-backed corporations to replace foreign-branded personal computers with domestic alternatives within two years, marking one of Beijing’s most aggressive efforts to eradicate key overseas technology from within sensitive institutions. Staff were asked after the week-long International Workers’ Day break, from last Saturday to Wednesday, to turn in foreign PCs for local alternatives that use operating software developed domestically, people familiar with the plan said. The exercise, which was mandated by central government authorities, is eventually to replace about 50 million computers within the government, and more in state-connected firms, the sources said. The...