Factories in China, struggling to reopen after the coronavirus shut down the economy, face a new threat from U.S. anti-disease controls that might disrupt the flow of microchips and other components they need.
The shock threatens to set back the ruling Communist Party's efforts to revive the world's second-largest economy after it declared victory over the outbreak. It would add to pressures on global business activity as Western countries close workplaces, limit travel and tell consumers to stay home.
Chinese manufacturers assemble more than 80% of smartphones for Apple, Samsung and other brands, half of the world's personal computers and a big share of home appliances and other goods. But they need U.S. processor chips and other high-value components.
