General items: Sales of office supplies; Sales of building materials; Sales of anticorrosive materials; Sales of materials in the business scope of thermal insulation; Manufacturing of special machinery for the production of building materials; Sales of building decoration materials; Manufacturing of building blocks; Sales of building blocks; Sales of packing materials for sealing; Stone processing for construction; Manufacturing of technical glass products; Sales of technical glass products; Metal structure manufacturing; Sales of ecological and environmental materials; Metal structure sales; Steel rolling processing; Building decoration, plumbing pipe parts and other metal products for construction: Manufacturing of building waterproof membrane products; Sales of building waterproof membrane products; Building cleaning services; Landscaping engineering construction: Manufacturing of special equipment for environmental protection; Urban and rural areas City appearance management: Sales of special equipment for environmental protection. (Except for projects that must be approved in accordance with the law, independently carry out business activities in accordance with the law with the business license) Licensed projects: Construction professional operations, construction engineering construction: Urban construction waste disposal (clearance); Residential interior decoration. (For projects that must be approved in accordance with the law, business activities can only be carried out after approval by the relevant departments. The specific business projects are subject to the approval documents or license documents of the relevant departments) (Shall not engage in business activities of projects prohibited and restricted by national and municipal industrial policies. )