Group 1 - The Chang-Jiu High-Speed Railway's Longxing Bridge has successfully completed the welding of its last segment, marking a significant milestone in its construction [1] - The Longxing Bridge spans 19 kilometers and integrates three transportation modes: high-speed rail, urban expressway, and main urban road [1] - The Chang-Jiu High-Speed Railway is a crucial part of China's medium- and long-term railway network plan, specifically the "Eight Vertical and Eight Horizontal" high-speed rail corridors [1] Group 2 - Upon completion, the railway will enhance the connectivity of the Yangtze River middle reaches urban agglomeration and surrounding city clusters, improving regional transportation infrastructure [1]