Manufacturing enterprises serve as the main implementers for the high-quality development of China's manufacturing industry. Accurately identifying the key elements that evaluate and influence high-quality development is a prerequisite for exploring the path of high-quality enterprise development. This paper defines the connotation of high-quality development of manufacturing enterprises from two dimensions, "state" and "process", and constructs the characteristic behavior sequence and related factor behavior sequence for high-quality development of manufacturing enterprises accordingly. Using the grey superiority analysis model, an empirical study was

conducted on 1017 manufacturing enterprises. The study found that: (1) The evaluation elements for high-quality development in different sub-sectors of the manufacturing industry exhibit significant industry-specific characteristics and internal laws. The overall evaluation indicators for the manufacturing industry cover four dimensions: management capability, innovation effectiveness, social effects, and operational benefits. Capital-intensive manufacturing industries focus on operational benefits and management capability; technology-intensive manufacturing industries take innovation effectiveness and social effects as their core; while labor-intensive

manufacturing industries emphasize management capability and social effects. (2) The distribution of key relevant factors in different manufacturing sub-sectors presents significant industry heterogeneity and certain regularity. The high-quality development of the overall manufacturing industry and labor-intensive industries is jointly driven by three-dimensional factors of resources, environment and benefits. The key factors of capital-intensive manufacturing are concentrated in resources and environment, while the factors of technology-intensive manufacturing focus on benefits and environment. In summary, theoretically, the indicator system constructed in this paper and the key elements of each sub-sector derived from empirical research provide a clear indicator framework for subsequent

scholars to study specific sub-sectors. At the practical level, the research findings offer useful management insights for managers and policymakers of manufacturing enterprises in China.