Manufacturing, repair, and sale of mine charging equipment; manufacturing, installation, repair, and commissioning services for power equipment (excluding special equipment); sale of power equipment and materials; design, manufacturing, and installation of industrial automation systems; manufacturing and installation of aluminum alloy doors and windows; manufacturing and installation of solar medium and high temperature equipment; manufacturing and sale of storage and transportation equipment; manufacturing, repair, and sale of industrial motor vehicles (forklifts); import and export of goods and technologies; environmental engineering technology development; manufacturing (excluding special equipment) and sale of environmental protection equipment.