Beijing circum-yatai environmental technology ltd. Is registered at room 0786, wu xing road, wuxiang town, thongzhou city, beijing. The registration authority is the market supervision authority of thongzhou district, beijing. The legal entity is represented by wang zhang zhang zhang, and its operations include technology promotion, technical services, technological development; sale of specialized equipment, general purpose equipment, mechanical equipment, special equipment for water treatment, electronics, construction materials, stainless steel products, household appliances, hardware exchange, cultural supplies, groceries, instrumentation, chemical products (other than dangerous chemicals), disinfection products (other than medicines); water pollution management; professional contracting; general contracting for construction; commissioning of manufacturing metals, specialized equipment, general equipment, machinery equipment; engineering design. (the subjects of the market may, in accordance with the law, freely choose to operate projects and carry out business activities; the design of works and projects subject to legal approval, which shall be carried out on the basis of the approved content, subject to the approval of the relevant sector; and may not engage in activities in which the state and municipal industrial policy prohibits and restricts the operation of such projects。