The legal person is the market supervisory authority of the city economic technology development zone and is represented by ludong snow, which operates in the form of ink iron tubes, tubes, cast iron drain pipes and pipes, ink and iron covers and beams, cast iron and submersible slabs, resin lids and sheeting, steel pipes, steel bars, valves, metal products (except for state prohibitions or restrictions on the operation of companies), construction materials (except dangerous chemicals), gold, plastics, rubber products, import and export operations for various types of goods and technologies (except for goods and technologies for which the state limits companies or bans import and export). (projects subject to legal approval may not operate without the approval of the relevant department)