Beijing chang cleaning services ltd. Is registered at building 103 of goose habitat road no. 33 of the huairou economic development zone, beijing. The registration authority is the market supervisory authority of huairou district, beijing. The legal entity is represented by gold chang and operates in the area of building cleaning services; domestic labour services; office cleaning services; specialized cleaning services for mechanical equipment; property management; construction project management; atmospheric pollution management; technology development, technical advice, technology transfer, technology promotion, technical services; organization of cultural and artistic exchange activities (other than performances); hosting of exhibitions; conference services; economic trade advice; sale of machinery equipment, household appliances, electronics, daily supplies, metal products, hardware exchange (other than electric bicycles), chemical products (other than dangerous chemicals); professional contracting, labour subcontracting, construction general contracting; greening of urban parks; engineering survey; engineering design. (an enterprise shall, in accordance with the law, freely choose to operate its own projects and carry out its activities; an approved project shall, in accordance with the law, operate its activities in accordance with the approved content, subject to the approval of the relevant sector; and it shall not engage in activities in which the industrial policy of the municipality prohibits or restricts the operation of projects of its kind