Core Viewpoint - The successful completion of the Jinyun Mountain Tunnel marks a significant milestone for the Chengyu Central High-Speed Railway, ensuring timely operation of the entire line [1][9]. Group 1: Project Details - The Jinyun Mountain Tunnel is 5,712 meters long, designed by China Railway Erju and constructed by China Railway 12th Bureau, featuring a single-hole double-track design [7]. - The tunnel's geological conditions are complex, with 89.69% of the surrounding rock classified as level IV and V, and it passes through coal mining areas, gas strata, and karst geology [7]. - Innovative construction methods were implemented, including emergency control, safety management, and intelligent monitoring, resulting in a monthly excavation rate exceeding 110 meters, improving efficiency by 22.3% [7]. Group 2: Strategic Importance - The Chengyu Central High-Speed Railway is a crucial part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, connecting major cities and enhancing regional transportation [9]. - Upon completion, the railway will significantly reduce travel time between Chengdu and Chongqing, improving accessibility for local residents and integrating with other high-speed rail lines [9].