Approved items: Medical mask production; Production of category II medical devices; Production of category III medical devices; The third category of medical devices; Production of disinfectants (excluding hazardous chemicals) (Items subject to approval according to law, business activities can be carried out only after approval by relevant departments, and the specific business items shall be subject to the approval results) general items: Medical research and experimental development; Engineering and technological research and test development; Technology promotion services; Manufacturing of electronic (gas) physical equipment and other electronic equipment; Plastic products manufacturing; Plastic products sales; Glass instrument manufacturing; Glass instrument sales; Mold manufacturing; Mold sales; Production of daily masks (non-medical); Daily use of masks (non-medical) sales; Wholesale of medical masks; Retail of medical masks; Import and export of goods; Production of category I medical devices; Sales of category I medical devices; Sales of category II medical devices; Sales of special chemical products (excluding dangerous chemicals); Production of protective equipment for medical staff (Class I medical devices); Medical staff protective equipment wholesale; Retail of protective equipment for medical staff; Production of special labor protection articles; Sales of special labor protection products; Sales of disinfectants (excluding hazardous chemicals) (except for projects that need to be approved according to law, independently carry out business activities according to law with business license)