Apple Supplier Quanta Faces Worker Unrest in China Under ‘Closed-Loop’ System Apple supplier Quanta Computer is seeing its “closed-loop” production bubble in Shanghai burst as factory workers grow increasingly agitated with the lockdown restrictions and revolt against management, according to a report from Bloomberg (via Yahoo Finance ). As China started grappling with its largest COVID-19 outbreak in two years starting in March, factories across the country faced shutdowns . China produces more than 90% of all Apple products for the world. Shanghai, which houses a large chunk of China’s industrial operations, felt the brunt of strict lockdowns to curb...