Counties are not only the basic unit for coordinating local economic and social development,urban and rural development,and regional development,but also the key and challenging areas for eliminating the differences between urban and rural areas and for realizing common prosperity of urban and rural residents.At present,unbalanced and insufficient development in China remains a pressing problem.Development of agriculture and the rural areas still lags,and the income gaps between urban and rural residents are still significant.Therefore,the reform of the market-based allocation of factors of pr...