The registered address of the iumac engineering and mechanical science ltd. Is 14-3-402 in the eastern district of the city of tianjin. The registration authority is the market supervision authority of the eastern district of the city of tianjin. The legal entity is represented by zhang lun and operates in the areas of technical extension services and maintenance of mechanical equipment; wholesale and retail trade; and the following branches are operating: production and processing of mechanical equipment. (projects subject to legal approval may not operate without the approval of the relevant department)