China's first million-cubic-meter salt-cavern hydrogen storage demonstration project is now operational in Pingdingshan, central China's Henan Province. The project is seen as a key step in addressing the challenge of large-scale, low-cost hydrogen storage and marks a new stage in the industrial development of China's hydrogen chain—integrating production, storage, transport and utilization into a cohesive industrial ecosystem. The project is designed to store 1.5 million cubic meters of hydrogen.