Core Insights - The construction of the key project, the Tongde Tunnel, for the Panyan Expressway has commenced, which will serve as a crucial link between the Panxi Economic Zone and the Northwest Ecological Demonstration Zone in Sichuan [3][4] - The Panyan Expressway, with a total length of approximately 131.3 kilometers, is designed to significantly reduce travel time between Panzhihua and Yanyuan, impacting over 4 million people, which accounts for 65% of the population in Panzhihua and Liangshan [4] Group 1 - The Tongde Tunnel is a separated long tunnel with a left line length of 14,450 meters and a right line length of 14,520 meters, facing geological challenges such as rock bursts and high geothermal conditions [3] - The construction team has implemented a GNSS monitoring system to continuously track the tunnel's position and detect potential geological hazards [3] Group 2 - Since entering the substantial construction phase in September, the Panyan Expressway has achieved key milestones in seven challenging engineering projects, including the Gesala Tunnel and the Jinsha River Bridge [4] - The expressway is part of the Sichuan Provincial Highway Network Layout Plan (2022-2035) and is a vital segment of national highways G4216 and G7611 [4]