Highquality development of the Yellow River basin is the main goal and task for Yellow River′s national strategy.The Henan section of the Yellow River is a key economic and cultural zone in the Yellow River basin (YRB).To clarify the spatial research scope in the Henan section of the Yellow River and conduct indepth research on the optimization of highquality development paths is of great strategic significance for the future growth of Henan Province and YRB. To clarify and define the research scope of the Henan section of the Yellow River and provide basic support for subsequent research work,the spatial research scope is divided into five subregions based on different research needs,namely: mainstream flow area,drainage area,water supply area,strategic implementation area,and all administrative regions.The mainstream flow area in the Henan section of the Yellow River refers to the area composed of all the municipal administrative districts in Henan Province that flow through the mainstream of the Yellow River,with a total area of 57,900 km2.The drainage area of the Henan section is 36,200 km2 within the jurisdiction of Henan Province.The water supply area is 104,000 km2 of the Henan section of the Yellow River,which refers to the area composed of all municipal administrative districts that use Yellow River water as a water supply source in Henan Province.The strategic implementation area in the Henan section refers to all municipallevel administrative areas affected by the Yellow River national strategy within Henan Province,covering 15 cities with a total area of 106,600 km2.Based on this zoning,15 cities in Henan Province are included in the Yellow River national strategy,and Nanyang,Xinyang,and Zhumadian are included in the development strategy of Yangtze River economic belt strategy.All administrative regions refer to all municipallevel administrative regions throughout Henan Province,iIncluding 18 cities in the province,with a total area of 167,000 km2. Based on an indepth understanding of highquality development,under the guidance of important ideas such as sustainable development,harmony between humans and water,and ecological civilization,a research framework for selecting highquality development paths for the Henan section of the Yellow River is constructed.[JP2]The tasks that need to be achieved to research the optimization of highquality development paths include safe supply of resources,ecological health and livability,orderly[JP] economic growth,social harmony and stability,and advanced cultural leadership.The key issues that need to be resolved include ①resourcesecologyeconomysociety harmonious balance theory and quantification; ②identification of key constraints on highquality development; ③optimization method for highquality development paths based on harmonious balance theory; ④construction of a harmonious regulation model for highquality development.The core technologies that need to be broken through include: ① Identification technology for the key constraints of highquality development of the resourceecologicaleconomicsocial composite system development; ②dynamic simulationoptimization technology for the optimization of highquality development path;③highquality development of multidimensional critical harmony control technology based on the harmonious balance theory. Four key contents of the research on the optimization of highquality development paths include: (1) resourceecologicaleconomicsocial composite system harmonious balance theory and quantitative research methods,including: ①the harmonious balance relationship between highquality development and resourceecologicaleconomicsocial;②resourceecologicaleconomicsocial harmonious balance model and theoretical framework system;③harmonious balance theory application rules and plan formulation cycle path method; ④harmonious balance discrimination criterion and quantitative evaluation method.(2) Identification of key constraints and countermeasures for highquality development of the Henan section of the Yellow River,including: ①analysis of the mutual feedback relationship between resourceecologicaleconomicsocial composite system;②identification of key factors restricting the highquality development based on system identification technology;③responding strategies for key constraints on highquality development under changing circumstances.(3) highquality development path selection and strategic layout in the Henan section of the Yellow River based on the harmonious balance theory,including:①analysis of the highquality development path; ②optimization of highquality development paths based on the harmonious balance theory; ③highquality development strategy layout.(4) the highquality development harmonious regulation model and application of the Henan section of the Yellow River,including: ①guidelines and indicators for the harmonious regulation of highquality development;②highquality development resourceecologicaleconomicsocial harmony goal and quantification; ③construction,application test and effect evaluation of highquality development regulation model.