On 28 August, the 2025 China International Big Data Industry Expo (Big Data Expo) commenced in Guiyang. Centred on the theme ‘Data Convergence Drives Industrial Momentum, Intelligence Unlocks New Chapters of Development’,this edition was characterized by its international scope, professionalism, and industrial focus. It featured specialised exhibitions, an opening ceremony, industry exchange activities, professional competitions, and a series of signature events. CEC showcased a range of novel data infrastructure solutions, alongside exemplary cases and solutions for high-quality Digital China development, organized around five key domains: foundational self-reliance, digital intelligence finance, digital intelligence security, high-quality datasets, and self-developed PC.