Zhang liangan, a legal person, is represented by zhang liang, the grand city market supervision authority, which has a registered address in guangdong township, guangdong township, hong kong province of hebei province. It operates on general projects: technical services, technical development, technical advice, technical exchange, technical promotion; sale of insulation and sound-proofing materials, sale of cement products, brick-making sales, sale of light-quality construction materials, sale of fire-proofing materials, sale of anti-fire-resistant materials, sale of eco-environmental materials, sale of electronic products, sale of machinery equipment, sale of chemical products (without licensed chemical products), sale of building decoration materials, sale of building water-proofing products, recycling of living resources (except for productive waste metals), import and export of goods, import of technology (with the exception of the above-mentioned legally approved projects, without legal prohibitions and restrictions); and licensed projects: construction works (subject to approval by the relevant authorities, to the approval of a specific business project, with the approval of documents or of a licence). (projects subject to legal approval may not operate without the approval of the relevant department)