Group 1 - The successful installation of a 2,200-ton steel truss beam marks the completion of the steel beam erection for the Shanghai section of the Huhang Railway project [1] - The project, undertaken by China Railway Fifteenth Bureau, includes the construction of two parallel lines: the Huhang Railway Shanghai Grand Bridge and the Husu-Tong Railway Phase II Shanghai Grand Bridge, with a total length of 19.15 kilometers [2] - The Huhang Railway's Shanghai-Nanjing section is part of the eastern route of the Huhang Railway, which is a significant component of the national "eight vertical and eight horizontal" high-speed railway network along the Yangtze River, with a total length of approximately 554 kilometers and a design speed of 350 kilometers per hour [2] Group 2 - The completion of this project is expected to optimize the railway network layout in the Yangtze River region and contribute to the high-quality development of the Yangtze River Delta integration [2]