The registration address of the twin-hylon seal materials plant is 300 metres north-west of zhang village council, the city's meadow town, and the registration authority is the management authority for the market of the river city. The legal entity's representative is zhang zhang yuhian, which operates on general items: the manufacture of seals; the sale of seals; the sale of graphite and carbon products; the sale of sealed fillings; the sale of rubber products; the sale of plastics; the sale of metals; the sale of synthetic materials; and the sale of non-metal minerals and products (the operation of which is carried out autonomously under a licence, except for projects for which authorization is required by law)。