The registered address of the housen minerals company limited is at no. 7 of the town of oxy hill in the city of liangyun, with the registration authority being the administrative approval authority of donghai county and with the participation of representatives of legal persons, and includes the manufacture of silicon micro-powder (crushing); the sale of stone sand, stone powder, stone powder, stone and silver powder, glass powder, aluminum oxide, magnesium oxide, calcium oxide, slurry; the development of new materials technologies; the import and export of self-employed and agency goods and technologies (with the exception of goods and technologies for which the state limits the operation of enterprises or prohibits their import and export) (projects subject to the law and subject to the approval of the relevant authorities)