In the case of the city of zheng city, where the registration address is located in the fourth group of gian-nin-tung residences of the city of zheng city, the registration authority is the administrative authority of the city of zheng city, represented by legal persons and includes the licensing of projects such as the manufacture of protective equipment for human defence and engineering; installation of protective equipment for human defence and engineering; sale of protective equipment for human defence and engineering; construction works; supervision of construction works; survey of construction works (subject to the approval of the law and to the approval of the relevant departments for the operation of the operation, subject to the approval of the approved project); development of mechanical equipment; sale of specialized equipment for environmental protection; manufacture of specialized equipment for environmental protection; manufacture of technology, technical advice, excha...