1. Engaged in technical development, technical consultation, technology transfer and technical services in the field of environmental protection science and technology, design, research and development, system integration and sales of environmental protection complete sets of equipment and accessories, water treatment complete sets of equipment and accessories, environmental protection automatic control system, sales of pumps, valves, electromechanical equipment, instruments and meters, environmental protection engineering, anti-corrosion and thermal insulation engineering, housing construction engineering, municipal public works, electromechanical equipment installation engineering and steel structure engineering. Where an enterprise's operation involves an administrative license, it shall operate with the license.
2. Environmental protection technology companies, tax consulting, bookkeeping agency, labor security consulting services, enterprise management consulting, business consulting, market information consulting and investigation, and enterprise registration agency. Where an administrative license is involved, it shall be operated with a license.
3. Environmental protection technology companies (not allowed to engage in bookkeeping), business consulting, enterprise management consulting, corporate image planning, market information consulting and investigation (not allowed to engage in social investigation, social research, opinion polls and opinion polls), technology development in the field of computer software and hardware, and sales of computers, software and auxiliary equipment (except special products for computer information system security), daily necessities and stationery. Where an enterprise's operation involves an administrative license, it shall operate with the license.
4. Environmental protection technology companies (not allowed to engage in agency bookkeeping), business consulting, enterprise marketing planning, enterprise management consulting, technology development in the computer field, technical services, technology transfer, technical consulting, trademark agency, computer software and hardware sales (except special products for computer information system security). Where an enterprise's operation involves an administrative license, it shall operate with the license.
5. Agency bookkeeping; Environmental protection technology companies, investment consulting, enterprise management consulting, enterprise marketing planning, enterprise investment management consulting, business information consulting, enterprise image planning, exhibition and conference services; Office equipment and accessories, office supplies wholesale and retail. Where an enterprise's operation involves an administrative license, it shall operate with the license.
6. Technical development, technical consultation, technical service and sales of Wujinjiaodian in the fields of environmental protection and automation machinery, electromechanical products, energy equipment and special electromechanical test equipment. Where an enterprise's operation involves an administrative license, it shall operate with the license.