The registration address of nanjing all-american engineering co. Ltd. Is located in one of the offices of the administration of government services in the gangning district of nanjing city, located on the 79th street of dongshan, nanjing district, located in room 604-1; the legal representative is jung sung ying ying, who works on the installation of engineering aids; the maintenance, installation, testing, reinforcement, alteration and construction of curtains; the construction, installation, repair, removal, cleaning, leaking of high-altitude buildings; the installation, spraying, cleaning, corruption prevention; the repair and inspection of the upper doors of the hull, cranes, windmills, oil platforms; the maintenance of stone materials; the cleaning, installation and maintenance of oil pipes; the construction of city and road lighting, the greening of the forest, the construction of municipal works; the construction of mine-proofing works; the sale of building materials, decouping materials, hardware, transportation and steel; and the cleaning services. General projects (project subject to legal authorization and subject to the approval of the relevant department): research and development of intelligent robots; sale of intelligent robots; manufacture of intelligent unmanned aerial vehicles; sale of intelligent unmanned aerial vehicles; sale of service consumer robots (in addition to projects subject to legal authorization, operating autonomously under a legal licence)