Beijing solid pipeline technology ltd. Is registered at room 0806, 7th floor, golden star road, 12th floor, beijing city. The registration authority is the market supervision authority of beijing city, da xing district. The legal entity is represented by zhang zhang zeng xian, and its activities include technical development; technical services; sales of plastics, mechanical equipment, rubber products, metal products, chemical products (without hazardous chemicals and with one type of toxic chemicals), hardware, electricity delivery; import and export of goods; import and export of goods by agents; import and export of technology; engineering survey design; professional contracting (enterprises are legally free to choose to operate on projects and carry out operations; projects that are subject to approval by law and are operated on the basis of approved content by the relevant authorities; and no activities may be carried out on prohibited or restricted projects under municipal industrial policy)