The hydrogen transportation sector is undergoing a significant transformation driven by the rise of Hydrogen Internal Combustion Engines (HICE). HICE technology is gaining momentum as a practical solution amidst challenges faced by fuel cell development, offering innovative features in combustion chamber redesign, injection systems, and safety protocols. These advancements include high compression ratios, precise injection control, material upgrades for enhanced heat resistance, and robust safety measures even in extreme conditions. The market ecosystem around HICE includes traditional ICE giants, automotive parts suppliers, tech startups, and energy companies investing in the industry's growth. Companies like Weichai Power and Bosch are at the forefront of technological advancements, with a focus on production scale-up and component innovation, driving efficiency gains and cost reductions. HICE applications are diversifying across heavy trucks, construction machinery, marine propulsion, and emergency power generation, showcasing improved efficiency and zero-carbon operation capabilities. The future outlook for HICE involves efficiency breakthroughs exceeding 45%, hybridization with batteries for energy savings, and full life cycle management through digital twin technology. The strategic value of HICE lies in its cost-effectiveness, providing a transition bridge for hydrogen technology adoption, and ecosystem compatibility with existing infrastructure. This positions HICE as a practical and efficient solution for the evolving landscape of hydrogen transportation, offering a promising pathway towards decarbonization and energy structure transformation.