China has installed more than 1,000 CCTV cameras in Phnom Penh as part of a new nationwide surveillance system, and activists say their every move online and offline is tracked by software, cameras and drones.

China has installed more than 1,000 CCTV cameras in Phnom Penh as part of a new nationwide surveillance system, and activists say their every move online and offline is tracked by software, cameras and drones.