Beijing polytechnic ltd. Has its registered address at a08, level 11, 88th floor, haidian road, beijing city, with its registered body, the market supervision authority of the haidian district, beijing city, with its legal representative chen shui, operating in the areas of technology development, technology transfer, technical advice and technical services; import and export of goods, brokering, export and import of technology; computer technology training; maintenance instrumentation; engineering and technical research and trial development; sale of mechanical equipment, electronics, computers, software and assistive equipment, communications equipment, chemical products (other than hazardous chemicals and a class of vulnerable chemicals); commissioning of processing instrumentation, mechanical equipment; and technical testing. (enterprises may, in accordance with the law, freely choose to operate projects and carry out business activities; projects that are subject to legal approval and that are subject to the approval of the relevant sector; and activities that are prohibited and restricted by the municipal industrial policy。