BBC shows China’s facial-recognition police surveillance network

The BBC reported on China’s expanding camera-surveillance network and gained access to a high-tech police control room. Its report described 170 million CCTV cameras already in place, with many using artificial intelligence and facial recognition. A police-arranged demonstration tracked correspondent John Sudworth through Guiyang. China Daily’s account said officers located him within seven minutes; this was a staged test, not an independent performance audit.