The registration address of the tianhui coal laboratory plant in the city of cranes is located at the brick factory in the southern capital of the city, located in the district of the mountain of cranes. The registration authority is the hill city subdirectorate of the city monitoring authority of cranes, represented by a legal person, and covers the production and sale of coal laboratory equipment, electrical equipment accessories; foot bolts, sale of hardware, office supplies (operated on the basis of a licence as prescribed by law and regulations)。