The registration address of the city of hebei is located in the village of zhang heungtung in the town of mauzhou city, hebei province. The registration authority is the inter-city market supervision authority, represented by a legal person, and includes the production and sale of glass cotton products, fibreglass products, rock cotton products (other than those restricted by national industrial policy and obsolete products); the sale of fire-resistant materials, heat-conservation sealing materials, chemical products (other than hazardous chemicals); and the construction of anti-corruption heating works. (projects subject to legal approval may not operate without the approval of the relevant department)