Core Points - The first mountain tunnel of the Guozi Valley pipeline, part of the West-East Gas Pipeline project, has been completed, marking a significant achievement in the construction capabilities of long-distance pipelines under complex geological conditions [1][2] - The Guozi Valley is a critical route for the West-East Gas Pipeline's second and third lines, which traverse the Tianshan Mountains, facing challenges from geological hazards [1] - The Guozi Valley pipeline project is expected to be fully operational by September 2027, having already transported over 557 billion cubic meters of natural gas, benefiting 500 million people along the pipeline [1] Industry Achievements - The Guozi Valley pipeline project features a total length of 32 kilometers, with four long-distance mountain tunnels comprising 23.16 kilometers, showcasing multiple industry records [2] - The tunnels have the longest single excavation length (6,612 meters), the largest cross-section (6,870 mm), the highest elevation (2,005 meters), the greatest height difference (324 meters), and the steepest slope (10.61%) in the domestic oil and gas pipeline sector [2] - This project is the first in the industry to cross an active seismic fault zone, utilizing the largest diameter and longest construction distance dual-shield full-face hard rock tunnel boring machine, ensuring an average safe excavation rate of 450 meters per month [2]