The registration address of dong ha steel company limited, a member of the register, is located at no. 391 to the west of the village of chiang quan, a city development area, and is known as the market supervisory authority of the city economic technology development zone, representing ju yulong, which operates in the areas of metal materials, construction materials, mechanical equipment, electronics, hardware, hardware, instrumentation, chemical products (except dangerous chemicals, easy to manufacture drugs) and import and export operations for the said products. (projects subject to legal approval may not operate without the approval of the relevant department)