On the morning of April 22, the first truss of box girders were successfully installed in the Luzhou section of the Southern Sichuan Intercity Railway, marking that the construction of the Luzhou section of the Southern Sichuan Intercity Railway project has officially entered the bridge erection stage. At 10:30 a.m., a 900-ton girder girder crane installed the first box girder weighing 720 tons on the railway piers of the cn-4 section, marking another crucial step forward in the construction of the Luzhou section of the Southern Sichuan Intercity Railway.