Some people say that there are poverty-stricken counties in Guangdong. Solved their own poverty problem, the Pearl River Delta is as rich as oil, and the northern mountainous areas are as poor as death. Guangdong has only one rich neighbor, and that is Hong Kong. Without Hong Kong, Guangdong is nothing.

There are no poverty-stricken counties in Beijing, but the surrounding environment is not good and there are no economically developed neighbors.

So only Shanghai is economically developed. Southern Jiangsu and northern Zhejiang around Shanghai have been the economic centers of the country since ancient times.