Shenzhen and other cities, are reaching a population of 60 million people. Shijiazhuang for its part, has a sad record: it is the city with the highest rate of air pollution in China. A pall of smog and soot rising only a few days a year. The Forest City in Shijiazhuang will be a new city for 100,000 inhabitants. A city of a new generation, capable of becoming a model of sustainable growth in a large country seeing, each year, 14 million farmers migrating to the cities.