大中矿业：在四川加达锂矿与湖南鸡脚山锂矿的盾构机掘进工作，目前均在按计划有序推进

Core Viewpoint - The company is progressing as planned with the tunneling work at its lithium mines in Sichuan and Hunan, utilizing tunnel boring machines (TBM) effectively [1] Group 1: Project Updates - At the Gada lithium mine project, the "Dazhong" and "Jiada" tunnel boring machines are operating steadily and advancing the project through a dual-machine collaborative tunneling mode [1] - At the Jijia Mountain lithium mine project, the "Longyuan" tunnel boring machine has efficiently completed 7.3 kilometers of excavation for the transportation corridor and access roads in the first half of 2025, and has recently undergone comprehensive maintenance and upgrades before being put back into operation [1]