The fifth Plenary Session of the 19th Central Committee of the Communist Party of China(CPC)proposed to promote high-quality development as the theme,accelerate the construction of a new development pattern with domestic major cycles as the main body and international and domestic double cycles promoting each other.Against this background,open development faces new situations,new missions and new requirements.Opening-up is an important path and the fundamental driving force for economic development.A higher level of opening-up will inject new impetus into the smooth development of the domestic cycle,play a leading role in the steady development of the international cycle,and pave the way for the interconnected development of both domestic and international cycles.Therefore,how to measure regional opening comprehensively and formulate effective regional opening policy is very important.It is based on the above background and problems that this paper studies how to promote high-level opening up and play its leading role in high-quality economic development under the new development pattern.Firstly,from the perspective of dual-cycle new development pattern,the paper analyzes the background and significance of open development and finds that it is more suitable to measure the level of open development at the provincial level in China from the perspectives of international opening,regional opening and intraregional opening,namely threefold openness.Through the analysis of measurement results,it is found that the threefold openness are on the rise year by year,and the development of opening up is unbalanced,and the lack of inter-regional opening and the lag of regional opening are the important reasons for the inadequate and unbalanced development of China’s opening up.Secondly,based on the analysis of the relationship between open development and high-quality economic development and the relevant theories of economic growth,the findings are as follows:(1)Threefold openness,international opening,regional opening and intraregional opening play a significant role in promoting the high-quality development of regional economy,and the improvement of opening level is in the same direction with the high-quality development of regional economy.(2)From the perspective of spatial effect,the estimated value of spatial spillover effect of threefold openness,international opening,regional opening and intraregional opening on high-quality economic development is significantly positive,which has significant direct and indirect effects,indicating that the regional opening development has a positive spillover effect on high-quality economic development of neighboring regions.(3)From the perspective of the spatial interaction coefficient between opening and high-quality economic development,threefold openness,international opening,regional opening and intraregional opening all have positive spatial interaction effects,indicating that there is a benign cooperation mechanism between international and domestic markets.(4)Compared with international opening and regional opening,intraregional opening plays a fundamental role in promoting high-quality regional economic development,and there are synergistic effects between international opening,interregional opening and intra-regional opening in promoting high-quality economic development.Finally,From the three dimensions of international opening,regional opening and intraregional opening,this paper proposes how to promote high-level opening and play a leading role in high-quality economic development under the new development pattern. |