https://www.wired.com/story/behind-rise-chinas-facial-recognition-giants/

Unfamiliar faces aren’t welcome at Beijing public housing projects. To prevent illegal subletting, many have facial recognition systems that allow entry only to residents and certain delivery staff, according to state news agency Xinhua. Each of the city’s 59 public housing sites is due to have the technology by year’s end.

Artificial intelligence startup Megvii mentioned a similar public housing security contract in an unspecified Chinese city in filing for an initial public offering in Hong Kong last week. The Chinese startup, best-known for facial recognition, touts its government dealings, including locking down public housing to curb subletting, as a selling point to potential investors.