Share this on Twitter Share this on Facebook Share this on LinkedIn Share this on Sina Weibo Share this on Wechat Share this on LinkedIn Illustration by Chris Koehler You won’t find SenseTime’s name on the building that houses its Beijing headquarters, but its technology guards the entrance. All workers must clear a security check by SenseTime’s facial-recognition software, and company employees pass a second face scan to enter their offices. In its entrance hall, SenseTime, a privately-held company now valued at more than $7 billion, shows off some of the products that made it one of the world’s hottest startups in artificial intelligence, and helped the company beat out Facebook’s facial recognition algorithm to become the most accurate in the world. By teaching computers to think like humans, AI technologies can replicate functions like speech, hearing and — SenseTime’s specialty — vision. A digital billboard in the lobby, for example, shows how SenseTime-enabled cameras placed in stores capture images of shoppers and then sort them by age and gender, creating valuable demographic data bought by retailers. On another screen,Subscribe or login to read the rest. Subscribers get full access to: Exclusive longform investigative journalism, Q&As, news and analysis, and data on Chinese business elites and corporations. We publish China scoops you won't find anywhere else. A weekly curated reading list on China from David Barboza, Pulitzer Prize-winning former Shanghai correspondent for The New York Times. A daily roundup of China finance, business and economics headlines. We offer discounts for groups, institutions and students. Go to our Subscriptions page for details.