Crude oil processing, oil products, chemical products, synthetic fibers and monomers, plastics and products, knitted textile raw materials and products, goods or technology import and export, catalyst preparation and waste recovery, electric water supply, water treatment, railway handling, inland waterway transportation, wharves, warehousing, design and development, “four skills” services, property management, leasing of private housing, training of employees within the system, design and production of various advertisements, and use of own media to post advertisements (involving licensed operation), quality inspection technology services.