Confronted with the core proposition of building a strong cultural nation in the digital era, the three foundations of the endogenous dynamics of Chinese culture, spiritual independence and autonomy, dynamic creativity at the subject level, and critical inheritance as well as self-renewal in practice, are transformed into driving forces for the development of Chinese culture through the progressive logic of "self-consciousness, self-confidence and self-realization". Faced with the challenges and opportunities brought by digitalization, cultural self-consciousness deepens cognition and reflection relying on the national big data system; cultural self-confidence establishes value identity through open dialogue on digital platforms; cultural self-realization achieves a leap from content production to leading a civilizational paradigm through the formulation and innovation of cutting-edge rules. The progressive development logic of the three promotes the paradigm transformation of China's cultural power construction from factor-driven to systematic and ecological-driven. While profoundly advancing the evolution of Chinese civilization, the core connotation of the endogenous dynamics of Chinese culture has accumulated profound spiritual resources for the great rejuvenation of the Chinese nation and global changes in the digital era, and contributed a vibrant development paradigm.