Group 1 - The completion of the Chazhenliangzi Tunnel marks a significant advancement in the construction technology of highland soft rock deformation tunnels, transitioning from the exploratory phase to a mature phase, providing a replicable technical solution for similar tunnel constructions [1][2] - The tunnel, located in Aba Prefecture, spans 3100 meters with an average elevation of 3650 meters, and is recognized as a rare highland soft rock deformation tunnel in the country, presenting significant construction challenges [2] - The project team implemented innovative construction methods such as rapid excavation, support, anchoring, and sealing, achieving a "zero invasion limit" requirement with no collapse or deformation post-construction [2] Group 2 - The Jiuma Expressway is a core segment of the national expressway network, connecting the G6 Beijing-Lhasa Expressway and facilitating transportation between northwest and southwest regions of the country [3] - Upon completion in 2027, the travel time from Chengdu to Jiuzhi County in Qinghai Province will be reduced from 8.5 hours to 5.5 hours, enhancing the integration of tourism and transportation in the "Great Jiuzhai" area [3] - The expressway plays a crucial role in improving the national and regional road network structure, promoting Sichuan's integration into the Belt and Road Initiative, and fostering regional economic development and ethnic unity [3]