Group 1: Overview of Hydrogen Commercial Vehicles - Hydrogen commercial vehicles utilize hydrogen as an energy source, making them more suitable for long-distance travel, high emissions, and demanding refueling requirements compared to passenger vehicles [1][2] - The hydrogen fuel cell system or hydrogen internal combustion engine is used in the powertrain module, with fuel cells offering better efficiency and environmental benefits, while internal combustion engines are easier for traditional automakers to adopt [1][4] Group 2: Market Status of Hydrogen Commercial Vehicles - In 2024, China's fuel cell commercial vehicle sales are projected to be 5,054 units, a year-on-year decline of 8.8%, primarily due to the absence of the previous year's "end-of-year surge" [1][17] - The sales of hydrogen fuel cell commercial vehicles in January-February 2025 reached 252 units, indicating a slow market uptake [1][17] - The majority of hydrogen fuel cell commercial vehicle sales in 2024 will be trucks, accounting for 4,309 units, a 1.7% increase, while the share of buses has dropped from 90% to 15% since 2020 [1][19] Group 3: Technological Developments - Hydrogen internal combustion engines have achieved thermal efficiencies exceeding 55%, surpassing diesel engines, with output power typically above 200 kW and reaching up to 412 kW [10][11] - The hydrogen fuel cell technology is transitioning from range-extended to hybrid systems, with future developments focusing on increasing fuel cell power output and efficiency [14][15] Group 4: Industry Growth Potential - The hydrogen energy vehicle market is expected to enter a "golden" period of development, driven by technological innovation, policy support, and improved infrastructure [1][21] - The rise of hydrogen commercial vehicles will stimulate the entire industry chain, from hydrogen production and storage to the construction and operation of refueling stations [1][21]