Group 1 - The Chang-Jiu High-Speed Railway has officially entered the overhead line construction phase with the installation of the contact network tensioning cable starting near Nanchang Changbei Airport Station [1] - The contact network project will involve the installation of 334.2 kilometers of contact lines, 26.2 kilometers of return lines, and 164.1 kilometers of lightning protection lines, with an expected construction period of 7 months [1] - Advanced BIM technology is being utilized to simulate the construction process, ensuring that each step meets design standards, while constant tensioning equipment is used to control the tension and straightness of the cables with millimeter-level precision [1] Group 2 - The Chang-Jiu High-Speed Railway is a key component of the national "Eight Vertical and Eight Horizontal" high-speed rail network and is part of the 102 major engineering projects outlined in the national "14th Five-Year Plan" [2] - The railway spans 138 kilometers from Lushan Station in Jiangxi to Nanchang East Station, enhancing connectivity between the Yangtze River Middle Reaches urban agglomeration, the Poyang Lake urban agglomeration, and surrounding cities in the Yangtze River Delta and Guangdong-Hong Kong-Macau regions [2] - The completion of the railway will significantly improve the high-speed rail network layout in China, facilitate the development of the Yangtze Economic Belt, and enhance the transportation infrastructure level in Jiangxi Province, promoting high-quality economic and social development along the route [2]