On October 23, as the last layer of loess in Zhangzimian was successfully excavated, the Shangcheng Tunnel, a controlled engineering project for the entire Pingqing Railway line, was successfully completed. This was also the first tunnel over 5 kilometers long to be completed on the entire line. The completion of the tunnel marks significant phased progress in the construction of the Pingqing Railway, laying a solid foundation for speeding up the quality of the project and opening to traffic on schedule.

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