Its registered address is in the villages of sihuang, yughuang township, xihuang township, hebei province. The registration authority is the grand city market supervision authority of yuang city, with wang yamong's legal representative, and its operations include general projects: technical services, technical development, technical advice, technical exchange, technology transfer, technical promotion; manufacture of insulation and soundproof materials; sale of insulation and soundproof materials; production of fireproof materials; manufacture of light construction materials; sale of light construction materials; manufacture of eco-environmental materials; sale of eco-environmental materials; production of fire-resistant materials; sale of fire-resistant materials; manufacture of rubber products; sale of rubber products; manufacture of plastics; sale of plastics; manufacture of asbestos products; sale of asbestos products; sale of asbestos products; sale of sealed fillings; manufacture of seals; sale of ink and carbonate products; sale of graphite and carbon products; manufacture of glass fibres and products; sale of fibres and products; sale of high-capacityed materials; sale of building materials; sale of building materials (no-hazard chemicals); sale of products without licensing. Licences (in addition to legally approved projects, operating on an autonomous basis under a business licence) for projects: subcontracting of construction services; construction work. (a project subject to legal approval may only be carried out with the approval of the relevant department, subject to the approval documents or licences of the relevant department)