China's technology conference where AI tracks people

Artificial intelligence companies have shown off their tracking technology at the World Internet Conference in China - giving a glimpse of how citizens are being watched everyday. Companies such as China's facial recognition start-up Face showed how their technology is already being used to identify and describe people. For the first time, the'Big Brother' conference was attended by top executives like Tim Cook of Apple, Sundar Pichai of Google and Jack Ma of Alibaba. Guided by the hand of the state, tracking technology has become widely accepted in China and this vast data collection could mean these companies have an edge over American competitors. One company present at the World Internet Conference in Wuzhen was Face which used its technology to identify people in the audience's gender, hair length, colour and clothing.