Xiaomi's 81,000-square-meter 'dark factory' uses robotic arms, automated guided vehicles, and AI quality inspection to manufacture smartphones without any human intervention. The lights stay off because robots don't need them. The facility handles everything from PCB soldering to final packaging.
BYD, Foxconn, and other Chinese manufacturers are replicating the model for EVs, batteries, and electronics. The advantage isn't just labor cost reduction — it's consistency. Robots don't have shift changes, fatigue, or quality variation. Defect rates in dark factories are an order of magnitude lower than traditional assembly lines.
The workforce implication is significant: China's manufacturing sector employs roughly 100 million people. Dark factories are currently limited to high-volume, standardized products, but the technology is moving toward mixed-model production lines that can handle customization.