中蒙两国第二条跨境铁路今天开工

Group 1 - The core point of the article is the commencement of the construction of the second cross-border railway between China and Mongolia, specifically the railway from Ganqimaodu, China to Gashuun Sukhait, Mongolia [1] - This new railway project marks the second cross-border railway between the two countries since the completion of the first railway from Erenhot to Zamiin-Uud in 1956, indicating a significant development in cross-border infrastructure [1]