Only 7 minutes is the 170 million Chinese surveillance camera system found BBC reporter

This test shows how fast and accurate the camera system is.

The camera system is equipped with face recognition technology and advanced artificial intelligence.

Police from Guiyang City in southern China were tasked with using the city's extensive surveillance camera network to locate BBC reporter John Sudworth . The camera system is equipped with face-recognition technology and advanced artificial intelligence, how long will it take to find correspondent John?

The answer is in the clip below:

With China's 170 million CCTV cameras, the security team lost seven minutes to find an individual of a total of four million people in the city. The 170 million mark is impressive, but China does not want to stop there: they plan to add 400 million more cameras in the next three years.

The more the camera, the more people will be supervised : the security department will have a complete list of what a person does, the person one meets, every action a person can take in day. They hope in the future, the system will also be able to predict where the crime will occur, to be able to prevent and handle in time.