Gauging China's AI strength

How far has China come in developing AI technology? And what challenges does it face? An expert helps us understand the thinking in Beijing.
Also this week: what can fifty thousand autonomous machines tell us about the future of robotics? And cutting edge tech helps cricket reach new audiences.
Presenter: Chris Vallance
Producer: Tom Quinn
(Image: An illustration of the Chinese flag over electronic circuitry. Credit: Getty Images)