Research and development, production of all kinds of packaging and product marking, printing equipment and its software, consumables, spare parts and ancillary equipment, sales of self-produced products and electronic communication products, and provide related technical consulting services; with the above products of the same kind of goods (except for specific commodities) of the import and export, wholesale, commission agency (except auctions) business; marking, printing equipment, and its spare parts and ancillary equipment, leasing business and maintenance. . [Items subject to approval in accordance with the law, can only carry out business activities after approval by the relevant departments]