On April 3, the Pipayan No. 1 Tunnel, the first tunnel on the newly built Xi'an-Chongqing High-Speed Railway's link into the Chongqing hub, was successfully holed through, marking new progress in the construction of the Xi'an-Chongqing High-Speed Railway.

　　The Xi'an-Chongqing High-Speed Railway's link into the Chongqing hub has a total length of 47.414 km and includes 31 bridges and 14 tunnels. The Pipayan No. 1 Tunnel holed through this time has a total length of 391.65 m and a maximum burial depth of 35 m. It is located in Beibei District, Chongqing, on the connecting line leading out from the departure end of Beibei South Station, and after connecting with the Tongjiaxi track sectioning post, it leads into Chongqing West Station.

　　Once the project is completed, Chongqing will achieve the goal of reaching Xi'an in 3 hours and Beijing in 6 hours, which is of great significance for continuously consolidating and expanding the achievements of poverty alleviation, comprehensively promoting rural revitalization, urban-rural integration and coordinated regional development, and building a new pattern of large-scale development of the western region.