The registration address of the hualle seal technology development company ltd. In east chang city is located at 7 ridge park road, located on the street of east city, covering general items: sale of seals; manufacture of seals; sale of sealed fillings; manufacture of sealed fillings; development of new materials; manufacture of moulds; sale of moulds; sale of mechanical parts, parts and components; and sale of mechanical equipment. In addition, the east chang city precision pump manufacturing company ltd. Is a subsidiary of its own, operating in the area of precision gear pumps。