Abstract: Making the construction of a super-large domestic market a sustainable historical process is a major strategic proposition put forward by the Party Central Committee based on the new development stage and the new development paradigm. This paper constructs a four-dimensional theoretical logical analysis framework characterized by transition of the principal social contradiction-transformation of the development stage-evolution of globalization strategy-construction of a unified national market. Drawing on the laws of economic evolution in major economies, it systematically elucidates the theoretical implications and historical inevitability of this proposition. Research findings: the sustainability of a super-large domestic market is inherently driven by the increasing marginal returns of institutional reform and openness, the network effects of institutional and technological innovation diffusion in major economies, and the integration of regional markets with domestic and international markets. Historical experience demonstrates that major economies transitioning from takeoff to mature modern economic systems typically progress from an external-driven internal phase reliant on external factors to an internal-driven external phase anchored in internal circulation. The historical evolution of a super-large market manifests as phased transitions from unified rules to scale expansion, and ultimately to functional upgrading. The policy implications of this study are: the path to building a unified national market should be designed with institutional reform and opening-up as the driving force, expanding domestic demand and optimizing structure as the means, and adjusting distribution policies as the guiding principle. By dismantling administrative monopolies, implementing factor market reforms, and innovating digital governance, a sustainable mechanism should be established where institutional innovation, market expansion, and technological governance mutually reinforce and advance together.
