Core Viewpoint - The successful completion of the last steel box girder installation and welding on the Chengdu-Dazhou-Wanzhou High-Speed Railway marks a significant milestone in the construction of the Suining Fujiang Grand Bridge, which is a key control project in the railway line [1] Group 1: Project Details - The Suining Fujiang Grand Bridge is located in Suining City, Sichuan Province, and spans a total length of 5,585.4 meters [1] - The main bridge features a special "H" type structure with a double-tower and double-cable steel-concrete composite girder, with a main span of 305 meters, ranking first in the southwest and second nationwide for this type of bridge [1] Group 2: Construction Progress - The Chengdu-Dazhou-Wanzhou High-Speed Railway has a total length of 477 kilometers and is designed for a speed of 350 kilometers per hour [1] - Currently, 136 tunnels have been constructed, with 130 already completed, and bridge engineering is 86% finished, while roadbed engineering is 96% complete [1] - The project is now entering the phases of ballastless track bed, station building, and electrical engineering [1] Group 3: Economic Significance - The railway line is an important part of China's "Eight Vertical and Eight Horizontal" high-speed rail network, facilitating direct access from Sichuan Province to the Yangtze River Delta and Beijing-Tianjin-Hebei economic zones [1] - The construction of this railway is significant for developing the Chengdu-Chongqing economic circle [1]