The registration address of west angxian used and used materials is located at no. 6 in the street of seoul, in the city of xi'an, and the registration authority is the market supervision authority of the ugang district of xi'an, represented by a legal person, and includes general operating projects: the sale of boilers, air conditioners, transformers, mechanical and electrical equipment, chemical equipment; the sale of fire-fighting equipment, hardware tools, labour safety supplies, electrical cables, metal materials; house demolition works, construction works, landscaping projects, decoration works, earthwork works, firework works, plumbing works, tunnel works; garbage removal services; rental of mechanical equipment; and the recovery and sale of used and productive metals, non-productive used metals, non-metal rehabilitation resources. (projects whose scope of operation is subject to legal authorization are not allowed to operate until approved by the relevant department)