The registration address of beijing hiroyo stainless steel is in changping district, beijing the registration authority is the market supervision authority of changping district, beijing city, on the 9th floor, building 1, waterway road. The legal entity's representative is zhang sing, and its activities include the manufacture of metal doors and windows; technical advice, technical services; professional contracting; sale of construction materials, metal materials, instrumentation instruments, mechanical equipment, hardware, hardware, electricity, rubber products, chemical products (without dangerous chemicals), handicrafts, and everyday goods. (the subject of the market may, in accordance with the law, freely choose to operate projects and carry out business activities; projects which are subject to legal approval and which are subject to the approval of the relevant sector; and activities in which the state and municipal industrial policy prohibits and restricts such projects