The registration authority is the data directorate of the new technology free sector (nin wu district), with legal representation, and includes the development, production, installation, maintenance and sale of fireproof doors and windows, fireproof curtain doors, metal doors and windows and accessories; the sale of hardware products, building materials, fire protection equipment, electrical machinery, smart control system devices, general-purpose equipment and accessories; and the import and export of self-employed and brokered goods and technologies (with the exception of goods and technologies for which the state limits company operations or bans import and export). (projects subject to legal approval may not operate without the approval of the relevant department)