Professional contracting of building decoration and decoration engineering, Professional contracting of building mechanical and electrical installation engineering, Environmental Protection Engineering、 Building Intelligent Engineering、 Fire protection facilities engineering、Waterproof, anti-corrosion and thermal insulation engineering, Clean room design and installation, Hospital system engineering professional contracting, sewage treatment、 Waste gas treatment, Gas pipeline engineering design and construction( The above projects are operated with qualification certificates); Laboratory overall planning and design、 manufacture、 Demolition、Install( Operating with qualification certificate) and technical services、 Technical Consulting; Sale: Building Materials、 Chemical products、 Chemical reagents( The above three items except hazardous chemicals)、 Color-coated steel plate、 Experimental equipment、 Laboratory bench cabinet、 ventilation system、 scientific equipment、 Instruments、 medical devices( The license involved is valid for operation within the validity period of the license, Specific projects are subject to approval by the approval department)、 Electronics( Except for national controlled products)、 Hardware and Electrical、 office supplies、 Mechanical and electrical products、 Building intelligent system equipment、 Security system equipment、 Digital video sound reinforcement conference system equipment; Import and export of goods or technology( Except for the import and export of goods and technologies that are prohibited by the state or involve administrative approval)。( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments。)