Abstract: Due to their extreme complexity, major engineering projects face a challenging requirement for modernizing the integrity governance systems and capabilities. This paper, based on in-depth research and analysis of the “Century Project” Pinglu Canal systematically analyzes its innovative mechanism and practical path of effectively solving the problems of “engineering corruption black box” and fragmented supervision by constructing a “four-in-one” integrity governance ecosystem of “system technology process culture”. So far as the case of Pinglu Canal project is concerned, a rigid constraint is established through institutional innovation to ensure no one can be corrupt, a digital governance base is created through technological empowerment to make it difficult for anyone to be corrupt, a transparent operating loop is formed through process reengineering to ensure no one dare be corrupt, and a value recognition is cultivated through cultural infiltration to ensure no one wants to be corrupt. The theoretical contribution of this paper lies in its proposing and verifying a new model of “full element full cycle full chain” clean governance empowered by technology, revealing the innovative coupling mechanism of “four in one”and “364” characteristic practices for governance optimization, and promoting the paradigm shift of clean governance in major projects from “post punishment” to “systemic immunity”. By combining the “147” supervision system, digital twin platform, “364” characteristic practices, and the practice of promoting integrity innovation, the coupling and collaborative efficiency of the “four-in-one” innovation mechanism are achieved, resulting in a system efficiency of “1+1+1+1>4”. It goes beyond the limitations of traditional clean governance measures of “point by point efforts” and vividly interprets how the advantages of the socialist system with Chinese characteristics can be transformed into specific governance effectiveness, providing a replicable and promotable “Chinese solution” for clean governance in major global projects.

Key words: Pinglu Canal Major Engineering Project, integrity governance, “four-in-one” mechanism, “364” special practice, systemic immunity