On January 18, the first 900-ton box girder of the Chengdu-Zigong high-speed railway was successfully erected at the Huangjiagou Bridge of the Chengdu-Zigong high speed railway project, marking the new stage of the transition from offline construction to offline and online construction of the Chengdu-Zigong high speed railway, making a breakthrough in the project's phased node goals, and accelerating the construction in an all-round way.