Core Viewpoint - The successful rotation of the Beidadianzi rail-road separation bridge marks a significant milestone in the construction of the Lingui Expressway, laying a solid foundation for its completion and operation [1][2] Group 1: Project Details - The Lingui Expressway spans a total length of 175.439 kilometers and is part of the national highway network plan from 2013 to 2030, specifically the G4515 link from Chifeng to Suizhong [1] - The Beidadianzi rail-road separation bridge is 840 meters long and is the only double-curve rotating bridge on the entire expressway, with a total width of 14.18 meters and a rotation weight of 4,950 tons [1][2] - The bridge construction faced challenges due to its "three complexities and one small" characteristics, which include being a curved bridge, having a small inter-line distance, and heavy engineering tasks [2] Group 2: Project Impact - The completion of the Lingui Expressway will enhance transportation access for regions such as Kalqin Banner, Ningcheng County, Lingyuan City, and others, significantly improving the transportation infrastructure in western Liaoning and eastern Inner Mongolia [2] - The project is expected to play a crucial role in revitalizing the old industrial base in Northeast China, promoting resource development along the route, and achieving regional economic integration [2]