The Nanzhushan Tunnel, a key and difficult project on the entire Chongqing-Qianjiang section of the Chongqing-Hunan High-speed Railway with a total length of 10794 meters, was successfully completed.

On March 16, the Nanzhushan Tunnel, a key and difficult project of the Chongqing-Qianjiang section of the Chongqing-Hunan High-speed Railway with a total length of 10794 meters, was successfully completed, laying a solid foundation for the completion and opening of the entire line.

The Chongqing-Qianjiang section of the Chongqing-Hunan High-speed Railway is an important part of the Xiamen-Chongqing Corridor in the nationally planned "eight vertical and eight horizontal" high-speed railway network. It is also an important part of Chongqing's "meter" shaped high-speed railway network. With a design speed of 350 kilometers per hour, it belongs to a typical southwest mountainous area. High-speed railway.

After completion and opening to traffic, it will significantly strengthen the rapid connection between the Chengdu-Chongqing twin-city economic circle and the urban agglomeration in the middle reaches of the Yangtze River and the urban agglomeration on the west bank of the Taiwan Strait, fill the gap in the high-speed rail in the urban agglomeration in the Wuling Mountains in southeast Chongqing, and realize the one-hour high-speed rail connection between the main urban area of Chongqing and the urban agglomeration in the Wuling Mountains in southeast Chongqing. It plays an important role in the coordinated development of the Chongqing region and promoting the transformation of tourism resources along the route into economic resources.