I think you meant to say population and not pollution. Population consists of the people in a region whereas pollution is the contamination of water/air/etc. Grammatical correction: "We did survived" is wrong. You could say "We survived" or "We did survive". I think you meant 'rebuild' and not 'rebuilt'. ---------- It would be helpful to see the chart that you mentioned so that we can understand your essay better. I think the chart illustrated the demographic shift in the Chinese cities and villages.

You should type the text into the EXERCISE section, then people can make corrections.

From the chart above, it is apparent that changes have taken place in the population of Chinese cities and rural villages. In the 1990s, one can see a huge gap between the number of residents in the cities and rural areas. At that time, the rural population was close to three times the number of city residents. But ten years later, the population living in cities increased steadily to 458 million while the rural village population stayed the same. By the 2010s, the mix was 50/50. Let us discuss the reasons behind these changes. How is that for a start?