Group 1 - The core viewpoint of the articles emphasizes the importance of hydrogen energy as a clean and low-carbon energy source, with China taking a leading role in its development and application [2][3][4] - Xiamen has officially issued the "Xiamen Hydrogen Energy Industry High-Quality Development Action Plan (2025-2027)", outlining goals for technological innovation, industry cultivation, and demonstration applications in the hydrogen sector [2] - By 2027, Xiamen aims to establish 30 hydrogen equipment and material production enterprises, develop hydrogen fuel cell vehicle demonstration routes, and build three hydrogen refueling stations [2][3] Group 2 - China has incorporated hydrogen energy into its "14th Five-Year Plan" and is using subsidies and standard-setting policies to promote industry growth [3] - In 2023, global hydrogen production exceeded 100 million tons, marking a 7.0% year-on-year increase, indicating that the hydrogen industry is entering a phase of scaled development [3] - China is the world's largest hydrogen producer, with a production of approximately 35.5 million tons in 2023, showing a consistent upward trend from 2016 to 2023 [4] Group 3 - The application of hydrogen energy is seen as having vast potential in sectors such as heavy trucks, shipping, and metallurgy, although challenges related to high costs and safety remain [6] - The concept of "pan-hydrogen" is proposed to broaden the utilization pathways of hydrogen by combining it with ammonia and alcohol derivatives, highlighting the importance of industrial by-product hydrogen in cost reduction [6]