R&D, production and sales of police equipment (excluding firearms and weapons, except for nationally restricted products), body armor, helmets, protective equipment, drones, clothing, electronic products, sales of computers and their accessories, Wujinjiaodian, fire-fighting equipment, photography and video equipment, communication equipment, office equipment, adhesives, cleaners, labor protection supplies, adhesive removers, sales of cars and motorcycles, car beauty services, computer system integration; sales of medical equipment.