Dong ning has a registered address at gate 35 of the building no. 2 of dong ning, dong ning, dong ning, dong ning, dong ning, heilong river province. The registered body is the market supervision authority of dong ning city and its legal representative is zhang zhang zhong, which covers the recycling and sale of used and end-of-life materials (except for scrap vehicles); the recovery, processing and sale of used and end-of-life metal materials (except for waste electrical appliances and hazardous waste); the recycling, sale, lease of mechanical equipment; the sale of vehicle spare parts, hardware for electricity and construction materials; equipment demolition services; re-engineering and re-engineering; the purchase of machine beds; the sale of hardware, leather, plastics and chemical products (except for dangerous chemicals); and the import and export of goods。