Printing binding services; power generation, transmission, and distribution (power supply) services. General items: printing special equipment manufacturing; packaging materials and product sales; graphic design and production; professional design services; metal surface treatment and heat treatment processing; non-residential real estate leasing; mechanical equipment leasing; import and export of goods; technology import and export; technical services, development, consulting, exchange, transfer, and promotion; road freight transport for ordinary trucks with a total mass of 4.5 tons or less (excluding network freight and dangerous goods); solar power generation technical services; non-metallic mineral product manufacturing; special ceramic product manufacturing.