The registration authority is the market supervisory authority of the city of beijing, represented by a legal person, han bao kong, whose business includes general projects: sale of doors and windows; sale of construction materials; furniture installation and maintenance services; sale of special equipment; sale of synthetic materials; sale of water-proofing products; internet sales (commodities other than those authorized for sale); distribution of electrical switch control equipment; sale of anti-corruption materials; sale of daily ceramics; manufacture of building decorations, spare parts for water heating pipes and other construction metal products; sale of furniture spare parts; repair of daily products; sale of metal tools; professional design services; installation of indoor wood doors and windows; manufacture of doors and windows; sale of fire equipment; sale of metal structures. (a project subject to approval by law may only be carried out with the approval of the relevant department, depending on the documents or licences approved by the relevant department) (no activity shall be carried out in the category of projects prohibited and restricted by the state and municipal industrial policy