Ordos
For Northwesten industrial city, we chose Ordos as an example.Ordos is located in the plateau of Inner Mongolia, with little precipitation and rich mineral resources. Considering the amount of factories, the treatment and recycling of all kinds of sewage is the foundation of the city.
Xingtai
For industrial city, we selected Xingtai as a representative. In recent years, the government of Xingtai has made great progress in sewage treatment. We mainly visit the environmental monitoring centre of this city and two sewage treatment plants in Xingtai.
Nanjing
For cities with intensive population, we chose Nanjing among the cities with effective methods of sewage processing.We mainly investigated the Nanjing Institute of Water Environment and laboratory of environmental assessment and pollution control of environmental protection pesticides.