The industry is non-metallic mineral products, and its business scope includes: general projects: sales of lightweight building materials; Container manufacturing; Container sales; Container maintenance; Container leasing services; Sales of doors and windows; Manufacturing and processing of doors and windows; Construction of metal doors and windows engineering; Wholesale of hardware products; Engineering management services; Manufacturing of lightweight building materials; Manufacturing of cement products; Sales of cement products; Manufacturing of architectural decoration, plumbing components, and other metal products for building use; Sales of building materials (except for projects that require approval according to law, business activities can be carried out independently with a business license in accordance with the law) License projects: import and export of goods; General contracting of housing construction and municipal infrastructure projects; Technology import and export