Recently, the Tieguanyin Tunnel of the Anxi National Highway 358 Project successfully broke through in both directions, laying a solid foundation for the construction and development of the Anxi County Comprehensive Three-Dimensional Grand Transportation (Grand Third Ring Road) Project.

　　The tunnel is located within Anxi County and is designed with separated left and right tubes. It is built to the standard of a Class I highway combined with an urban arterial road, with a dual-direction, six-lane layout and a design speed of 60 km/h. The left tube has a total length of 2,800 meters and the right tube a total length of 2,786 meters, making it an extra-large cross-section, long tunnel.