Research On The Measurement,regional Differences And Convergence Of China’s Open Economy Level Under The Background Of Double Circulation

At present,the international situation is changing.Some countries,affected by the COVID-19,are engaged in unilateralism and trade protection measures.International trade exchanges have declined sharply,and the global governance system is facing challenges.As one of the major economies that still maintained positive economic growth during the epidemic,China remains unswervingly committed to the basic national policy of opening to the outside world,and proposes to "accelerate the construction of a new development pattern with domestic macro circulation as the main body and domestic and international dual circulation promoting each other",and "develop a higher level of open economy".Based on this,this paper starts from the background of double circulation and the direction of high-quality economic development,elaborates and analyzes the connotation of the development of the open economic system in the current era,and uses the data from 2011 to 2020 among provinces in China to build an indicator system from four dimensions of open economy,open scale,open structure,and open potential to measure the development level of the open economy in 31 provinces in China in the past decade,The exploratory spatial analysis method is used to analyze its spatial correlation,and the Kernel density estimation is used to observe its evolution characteristics.On this basis,the Dagum Gini coefficient decomposition is used to explore the regional differences and their sources in different regionalization sub regions in China.After understanding the regional differences,the analysis is conducted to determine whether they meet the hypothesis of economic convergence,and reasonable and feasible policy recommendations are given based on the research content of this paper.The research finds that: 1.There are regional differences in the development of China’s open economy.The overall performance is that the eastern region is superior to the central and western regions,and the coastal region is superior to the inland region.2.China’s open economy developed steadily and regional differences narrowed between 2011 and 2019,but it was severely hit by the COVID-19 in 2020.3.The differences of China’s open economy mainly come from regional differences.4.China’s open economy does not show a significant convergence trend,and most regions conform to the convergence mechanism.