Engaged in construction engineering technology, energy conservation technology, environmental protection technology in the field of technology development, technical advice, technical services; environmental protection equipment development, sales; environmental protection engineering design, construction; construction materials, machinery and equipment, instruments, wire and cable sales, technical services. (Projects subject to approval in accordance with the law, approved by the relevant departments before operating activities) General projects: computer software and hardware and auxiliary equipment retail; computer software and hardware and auxiliary equipment wholesale; software development; software sales; industrial control computer and system manufacturing; industrial automatic control system device sales (except for projects subject to approval in accordance with the law, with a business license to carry out business activities independently in accordance with the law)