At 2:36 on October 28, at the track laying construction site of Xiaoxiangling Tunnel in Yuexi County, the Chengdu-Kunming Railway Capacity Expansion Project, the Eighth Bureau of China Railway completed the welding of the last pair of 500-meter-long steel rails, marking the completion of the track laying of the entire line of the Xincheng-Kunming Railway, laying a solid foundation for the opening of the whole line.