The total length of the route is 7.98km, and the route generally runs from north to south. The main amount of work is excavated earthwork of 866,000 cubic meters, excavated stone of 925,000 cubic meters, 1.805 million cubic meters of fill, maximum excavation depth of road cutting is 44.2m, and maximum fill height is 22.36m. The project is located in the southern hilly area of Gannan