Manufacture of hardware products; Manufacture of daily-use metal products; Manufacture of material handling equipment; Manufacture of hand carts and animal-drawn vehicles; Manufacture of plastic products; Sales of metal products; Retail of hardware products; Sales of material handling equipment; Sales of hand carts and animal-drawn vehicles; Sales of plastic products; Metal surface treatment and heat treatment processing; Internet sales (except for goods requiring sales permits); Manufacture of photovoltaic equipment and components; Leasing of photovoltaic power generation equipment; Sales of photovoltaic equipment and components; Manufacture of power distribution switchgear equipment; Research and development of power distribution switchgear equipment; Sales of power distribution switchgear equipment; Manufacture of power facility equipment; Sales of power facility equipment; Sales of electrical equipment. Licensed items: Power generation, transmission, and supply (distribution) business; Installation, maintenance, and testing of transmission, supply, and receiving power facilities; Electrical installation services.