The registration authority is the grand city and county market supervision authority of yamaya city, represented by legal persons, and includes the manufacture and sale of eco-environmental materials (excluding dangerous chemicals), chemical product sales (excluding licensed chemical products), paint sales (excluding dangerous chemicals), fire-proof blocking materials sales, fire-resistant materials sales, sales of building water-proofing and water-condensed materials, sales of building materials, sales of heating materials, and sales of sealed items. (projects subject to legal approval may not operate without the approval of the relevant department)