On January 15, the Xiayan Tunnel of the Quzhou-Lishui Railway under Zhejiang Communications Group was successfully holed through. This is the first tunnel over 1 km on the entire Quzhou-Lishui Railway line to be completed.

The Xiayan Tunnel has a total length of 1347.661 m and is designed as a single-tube double-track tunnel for a speed of 200 km/h, with a maximum burial depth of about 155 m. Construction was extremely difficult due to frequent geological changes, developed fissures, broken rock masses, and poor surrounding rock stability. According to the relevant person in charge of the Quzhou-Lishui Railway Construction Command, the natural slope at the exit section of the Xiayan Tunnel is about 50°, making it impassable for construction machinery and posing extremely high safety risks.

To ensure the smooth progress of the project, the Quzhou-Lishui Railway Construction Command actively coordinated with the participating construction units and optimized the construction organization. At the entrance portal, it also adopted mechanical excavation plus controlled blasting and deployed two L20-N blasting vibration monitors, thereby overcoming the adverse effects of a narrow construction site, the absence of accessible roads, steep mountain terrain, complex geological conditions, and the proximity of the entrance to a village, ensuring that the construction process remained safe and controllable. In addition, the Quzhou-Lishui Railway Construction Command gave full play to the important role of Party member vanguard posts and youth commando teams in tackling key difficulties, assigning Party members and young people to major and difficult work points to take the lead in assaulting tough tasks and rising to challenges, and conducting safety education and training many times, thus providing solid organizational guarantees for the smooth advancement of the project.

Next, the Quzhou-Lishui Railway Construction Command will continue to pool wisdom and strength. In response to the characteristics and difficulties of a high bridge-to-tunnel ratio, it will customize construction plans and closely monitor safety risks to ensure the project advances toward its 2027 opening at the fastest speed and with the highest quality, contributing all its strength to improving the road network layout in southwestern Zhejiang, building Zhejiang Province's beautiful "Grand Garden" corridor, and constructing the demonstration zone for common prosperity.