The registration address of chongqing han young cleaning engineering ltd. Is located at a1-2 plant no. 2 at conning road, qingshan street, chongqing city. The mountain market supervisory authority, represented by a legal person, luhaiji, operates under a licence project: construction works. (a project subject to legal authorization and subject to the approval of the relevant department may only carry out an operational activity, subject to the approval of the relevant department, which shall be based on documents or licences approved by the relevant department) general projects: water pollution management; sale of equipment specially designed for the protection of the environment; manufacture of metal materials; sale of metal materials; construction of metal structures; sale of metal structures; production of axle steel products; sale of steel bars for construction; steel pressure long processing; manufacture of light-quality construction materials; sale of lightweight construction materials; manufacture of insulation and soundproofing materials; sale of insulation and soundproof materials; sale of non-metal mines and products; (business activities are carried out autonomously under licence, except for legally approved projects)