The registered address of beijing qiboshan air cleaning engineering ltd. Is located at unit 717, 1 9th floor, 3rd floor, beijing economic technology development zone, beijing. The registration authority is the market supervision authority of beijing economic technology development zone, represented by a legal person and includes technical extension services; engineering project management; professional contracting; economic trade consultancy; sale of mechanical equipment, plastics, glass products, instrumentation forms; master contract for construction; maintenance of equipment; installation of equipment; central air conditioning cleaning; and quality inspection technical services. (the subject of the market may, in accordance with the law, freely choose to operate projects and carry out business activities; projects which are subject to legal approval and which are subject to the approval of the relevant sector; and activities in which the state and municipal industrial policy prohibits and restricts such projects