Core Viewpoint - The article discusses the successful evaluation of a major technological project focused on the research and development of key technologies for the transportation and application of low-pressure pure hydrogen and hydrogen-blended gas pipelines, highlighting significant advancements in the field of clean energy [2][4]. Group 1: Project Overview - The project, involving 11 leading research institutions and clean energy companies, aims to tackle critical challenges in hydrogen transportation technology [2]. - The evaluation meeting was held at Tsinghua University, featuring a committee of seven industry leaders who rigorously assessed the project's technological routes and core achievements [4]. Group 2: Technological Achievements - The project successfully developed welding and transportation processes for pure hydrogen and hydrogen-blended gas pipelines, along with innovative equipment for precise hydrogen blending [4]. - It has resulted in one international invention patent and 36 Chinese invention patents (25 granted), as well as 11 utility model patents and the formulation of six national/enterprise/group standards [4]. Group 3: Practical Applications - Tongliao Longshengfeng, the operator of the first long-distance high-pressure natural gas pipeline in the Inner Mongolia region, has established nearly 600 kilometers of gas pipelines and is now implementing a 4-kilometer hydrogen-blended gas pipeline [5]. - The project partners, including Oko Energy, have provided blending equipment for hydrogen demonstration projects in multiple cities across the country [5]. Group 4: Future Directions - The project has received high praise from top experts, marking a new starting point for technology transfer and industrial upgrading in the hydrogen sector [6]. - Future efforts will focus on deepening technological iterations and promoting the application of hydrogen-blended gas pipeline technology in various fields, contributing to the optimization of regional energy structures and supporting national carbon neutrality goals [6].