The Visual Investigations team at The New York Times reported and produced this video, drawing on some 100,000 procurement documents provided by ChinaFile.
Research shared with the Times built off of Jessica Batke and Mareike Ohlberg’s 2020 ChinaFile article “State of Surveillance: Government Documents Reveal New Evidence on China’s Efforts to Monitor Its People.”
Additional Times coverage related to this research is available here on their website.