The registration address of hengjing environmental technology ltd. In beijing is located in room a3120, 9 a, fengdong street, yang song town, huairou city, beijing. The registration authority is the market supervision authority of huairou district, beijing. It is represented by a legal person and includes the development of technology, technology promotion and technical services for environmental protection; atmospheric pollution management; water pollution management; the sale of general-purpose equipment, metal materials, non-metal materials, plastics, chemical products (excluding dangerous chemicals), hardware, construction materials, machinery and equipment; the general contracting, professional contracting and subcontracting of labour; and the leasing of construction engineering machinery. (the subject of the market may, in accordance with the law, freely choose to operate projects and carry out business activities, as well as projects subject to legal approval and subject to the approval of the relevant sector, and may not engage in activities in which the state and municipal industrial policies prohibit and restrict such projects