Core Viewpoint - The successful completion of the Zhongdu River Grand Bridge marks a significant milestone for the Yibin to Panzhihua Expressway, which is set to be completed and opened to traffic by 2027, enhancing connectivity in the region [2] Group 1: Project Details - The Zhongdu River Grand Bridge is a key control project located in Xinshi Town, Ping Shan County, Yibin City, with a total length of 616 meters and a main span of 320 meters, crossing a steep V-shaped valley [2] - The construction faced complex conditions including deep water, steep slopes, and fast currents, prompting the project team to innovate with advanced techniques such as "trackless rear support hanging basket technology" [2] Group 2: Investment and Impact - The Yibin to Panzhihua Expressway is the largest single investment highway project in the history of highway construction in China [2] - Upon completion, the travel time from Yibin to Panzhihua will be reduced from 10 hours to 6 hours, significantly improving transportation efficiency in the region [2]