The sprawling factory compound, all grey dormitories and weather-beaten warehouses, blends seamlessly into the outskirts of the Shenzhen megalopolis. Foxconn’s enormous Longhua plant is a major manufacturer of Apple products. It might be the best-known factory in the world; it might also might be among the most secretive and sealed-off. Security guards man each of the entry points. Employees can’t get in without swiping an ID card; drivers entering with delivery trucks are subject to fingerprint scans. A Reuters journalist was once dragged out of a car and beaten for taking photos from outside the factory walls. The warning signs outside – “This factory area is legally established with state approval. Unauthorised trespassing is prohibited. Offenders will be sent to police for prosecution!” – are more aggressive than those outside many Chinese military compounds.