Group 1 - The completion of the main structure of the first large-span high-speed railway cable-stayed arch bridge in China marks a significant milestone for the construction of the Xi'an-Chongqing high-speed railway [1] - The bridge, located in Dazhou, Sichuan Province, spans 443.1 meters and utilizes a unique design with multiple intersecting cables to enhance load distribution and reduce bending moments [1][2] - The construction involved a steel box cable-stayed arch bridge weighing 2,600 tons, measuring 147 meters in length and 17 meters in width, with a pushing displacement of approximately 146 meters over a period of 10 days [2] Group 2 - The Xi'an-Chongqing high-speed railway is a crucial part of China's "eight vertical and eight horizontal" high-speed rail network, specifically the Jingkun corridor from Beijing to Kunming and the Baoyin-Haikou corridor [2] - The main line of the Xi'an-Chongqing high-speed railway (Kangyu section) is 478 kilometers long, connecting various regions including Ankang, Chongqing, and Dazhou [2]