It's known as the "Chinese Silicon Valley". Zhongguancun, a tech hub north of Beijing, has become a symbol of growth and prosperity for many young entrepreneurs. Its success has been largely attributed to reforms put in place by President Xi Jinping during his first mandate. But while some are benefiting from these reforms, others have been left behind, especially poor and unskilled workers coming from the countryside as well as migrants living in newly created slums. Our correspondents report.
Report by Pierre-Philippe Berson, Jason Zhao and Paul James.
A programme prepared by Patrick Lovett and Florence Viala