Why are there fewer and fewer people in Pujiang, Yiwu?

There are fewer and fewer people in Pujiang, Yiwu. According to relevant information, the steps are as follows:

1. The local people don't live in Yiwu, but the registered permanent residence hasn't moved. Yiwu belongs to a region with relatively developed economy and transportation, and is adjacent to economically developed cities such as Hangzhou and Shanghai. There are many local businessmen and rich people. Those who do business in Yiwu have settled in Hangzhou, Jinhua or other places, but their hukou has not moved in Yiwu. For example, many rural friends who have settled in big cities have settled in cities, but their hukou has not changed.

With the expansion of the city, a small city with its own congestion has become a big city. According to relevant data, the floating population in Yiwu is about10.3 million (except for the permanent resident population of 500,000, the floating population is basically 800,000). It is inevitable to expand the urban area to meet the needs of so many people. How big was the downtown area of Yiwu ten years ago, and how big is it now? I believe everyone knows that the urban area is not crowded when the population growth is not so fast.