Environmental protection technology research and development; Landscaping; Environmental testing; Sale: Home appliances; Fresh air system installation; Home Repair; Plumbing, electrical and heating installation and maintenance, Building Intelligence、 Fire Fighting、 R&D and services of air conditioning technology: Building intelligent engineering、 Fire Engineering、 Air conditioning engineering、 Mechanical and Electrical Engineering、 Decoration and renovation project、 Building curtain wall engineering、 Landscaping Project、 Design of building waterproofing engineering、 Construction and maintenance; Weak current system integration、 Intelligent building system integration、 Security system integration, Computer Information System Integration, Information system integration and services, Technology R&D and services for smart city informatization,Design of confidential projects、 Construction and maintenance, Audio and video intelligent system integration engineering design、Install、 Commissioning and service, Computer hardware and software、 Electronics、 Technical development of digital products; Software Engineering、 Software Design、 Development and application of office automation projects; Big Data、 Development and application of cloud data; Smart city construction; Intelligent security operation and maintenance services; Electronic file scanning、 maintain、 Application and Management; Sale: Building intelligent equipment、 Firefighting equipment、 air conditioner、 Computer hardware and software、 Electronics、digital products、 Hardware and Electrical、 building materials。 Medical technology development、 Technical Consulting、 Technology Transfer; wholesale、 retail: food、 medical devices、 Instruments、 water treatment equipment、 teaching equipment、 Computer hardware and software、 office equipment、 Electronics、 office supplies; Clinical testing services; Inspection and Quarantine Services; Marketing Planning; Conference and Exhibition Services; Import and export business; Market Research; Manufacturing of laboratory equipment、 Sale。( Projects that require approval according to law, Business activities can only be carried out after approval from relevant departments)