The registration address of tienhai steel company ltd. Is located in li jiang village, old county town, and the registration authority is the lao county administration for business and industry, represented by a legal person li lei, which operates in the following areas: steel pipe, acoustic tube, cooling tube, slurry tube, zinc plating tube, bellow pipe, sink board, bridge material, pipe fittings, french, steel, construction materials, import and export of goods (project subject to approval by law, operation only with the approval of the relevant department)