坚朗五金：公司经营聚焦以建筑五金为核心的建筑配套件领域拓展

Group 1 - The company focuses on expanding its business in the field of building hardware, specifically in building accessories [2] - The products are widely used in various business scenarios, including residential buildings, public commercial buildings, rail transit, hotels, and factories [2] - The company does not engage in the commercial aerospace sector [2]