China Energy Engineering Group Co., Ltd. made significant progress in key technologies and core equipment for hydrogen energy through a major science and technology project focused on the entire industry chain of hydrogen energy. The project covered various aspects such as production, storage, transportation, refueling, and utilization of hydrogen. Led by experts from scientific research institutions and top-tier enterprises in the hydrogen energy industry, the project achieved technological breakthroughs in electrolytic hydrogen production, hydrogen purification, hydrogen liquefaction, and green hydrogen-based ammonia synthesis. Notable accomplishments include the development of a 1000Nm³/h alkaline electrolyzer, a 1400Nm³/h PSA industrial by-product hydrogen purification process technology, and a 1t/d hydrogen liquefaction process engineering plan. Furthermore, the project advanced in flexible ammonia synthesis and integrated hydrogen production and refueling stations, contributing to the infrastructure for hydrogen utilization.