天健集团：全资子公司积极参与深圳地铁等重点地下空间基础设施建设

Group 1 - The core viewpoint of the article highlights that Tianjian Group's wholly-owned subsidiary, Shenzhen Municipal Group Co., Ltd., is actively involved in the construction of key underground infrastructure projects, such as the Shenzhen Metro, contributing to the city's development [1] Group 2 - The company leverages its professional technology and construction experience to participate in significant urban infrastructure projects [1]