2. Maintenance service. Repair service refers to the engineering operation of repairing, strengthening, maintaining and improving buildings and structures to restore their original use value or extend their service life.
3. Engineering services. Engineering service refers to the construction and transformation of various buildings and structures.
4. Install the service. Installation services refer to production equipment, power equipment, lifting equipment, transportation equipment, transmission equipment, medical experimental equipment and other equipment.
5. Other construction services. Other construction services refer to all kinds of engineering operation services except the above-mentioned engineering operations.
Including providing substantive services for enterprises, such as providing building materials information and products for construction projects, providing equipment manufacturer information and products, providing construction enterprise information and project contracting, providing human resources, technical services and consulting to realize project construction, providing resource information and related services such as machines and tools, ground materials and turnover materials needed for construction projects, and even providing engineering-related services such as daily necessities and housing rental.