The study looked at how different regions in China are growing economically. They found that the GDP per person in each province is getting closer to each other over time. By using a special method called Spatial Econometrics, they showed that the provinces are getting more similar in terms of wealth. This method helped them avoid some common problems in this type of research. The provinces are converging at a rate of about 2.05% per year, which is faster than previously thought.