General projects: Engineering and technical research and test development; Retail of protective equipment for medical staff; Sales of category II medical devices; Sales of category I medical devices; Commodity sales; Sales of daily provisions; Plastic products sales; Hardware retail; Sales of special labor protection products; Rubber products sales; Sales of chemical products (excluding licensed chemical products); Machinery and equipment sales. (Except for projects that need to be approved according to law, independently carry out business activities according to law with business license) Technology import and export; The third category of medical devices. (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments. Specific business projects shall be subject to approval documents or licenses of relevant departments. )