In the first four months, railway authorities focused on network integration, gap filling and chain strengthening, making positive progress on multiple railway projects. In Gansu, the Lanzhou-Hezuo Railway, built by China Railway 18th Bureau, completed its first box girder installation. In Tianjin, the "Thousand-Mile Haihe High-Speed Rail's First Tunnel," part of the Tianjin-Weifang High Speed Railway, constructed by China Railway 14th Bureau, is advancing steadily. In Jiangsu, the Tongtaiyang Bridge continuous beam crossing the Guma Dry River, a key project of the Shanghai-Chongqing-Chengdu High Speed Railway by China Railway 11th Bureau, was successfully closed. In Guangdong, the continuous beam of the Shiyuan Bridge on the Zhuhai-Zhaoqing High Speed Railway, built by China Railway 16th Bureau, was also successfully closed.