The business scope includes the manufacturing of metal pressure vessels, metal sealing parts, specialized equipment installation (excluding elevators and boilers), specialized equipment manufacturing for textiles, specialized equipment repair (excluding marine engineering equipment), specialized equipment sales, high-tech green battery manufacturing, such as nickel-hydrogen batteries, zinc-nickel batteries, zinc-silver batteries, lithium-ion batteries, solar batteries, fuel cells (excluding energy storage for new energy vehicle power batteries), lithium-ion battery manufacturing, nickel-hydrogen battery manufacturing, and other battery manufacturing (excluding photovoltaic batteries). Additionally, it involves electrical equipment manufacturing, software product development, production, information system integration services, computer room maintenance services, information technology consulting services, integrated circuit design, industrial design services, engineering technical consulting services, electrical machinery manufacturing, electrical machinery equipment sales, engineering project management services, engineering general contracting services, electromechanical equipment installation engineering contracting, energy-saving technology promotion services, mechanical technology promotion services, environmental protection technology promotion services, wholesale and retail of mechanical parts, mechanical equipment leasing, technology import and export, textile scientific and technological research services, energy-saving technology development services, energy-saving technology consulting and exchange services, energy-saving technology transfer services, mechanical technology development services, mechanical technology consulting and exchange services, mechanical technology transfer services, trade agency, trade consulting services, etc.