Shilin Tunnel is located at qy球友会 section between Mile Station and Banqiao Station. qy球友会 18,208-meter tunnel is qy球友会 longest one-portal double-track tunnel in China and qy球友会 world's longest karst tunnel by drill and blast construction. qy球友会 maximum depth of qy球友会 tunnel is approximately about 250 meters. It started in August 2010 and is under construction at present. It is complex in geology, crossing six faults and four fracture zones, and is located at qy球友会 watery block in Mile City, which make it a level I risky tunnel. qy球友会 five R&D or improvement achievements of qy球友会 project were awarded qy球友会 national utility model patent certificates, namely, “Dryer Spin Network Supporting Structure”, “Hot Melt Welding Machine with Sealing Belt”, “Wind Separation Deduster”, “Multifunctional Monitoring and Measuring Pile of Tunnel”, and “Ultrasonic Welding Drill”.

Shilin Tunnel of Nanning-Kunming Railway