Over 85 percent of the world's population come from developing countries – 6.7 billion if you want to know the actual number. And birth rates in the developing world are much higher than the stagnant population growth of developed countries. But with weak infrastructure, limited access to quality education and political instability being just some of the barriers they face, developing countries are forced to work hard to provide better lives for their people. So how can the fields of construction and engineering offer countries a way out? In this episode of Mega Reality, CGTN's Xu Xinchen speaks with engineers from around the world to find out.