Industrial investment; aluminum products (except smelting), household electric heating appliances, metal decorative materials, electric vehicles and accessories, auto parts, motorcycle accessories, plumbing equipment, fitness equipment, power tools, metal tools for agriculture and gardening, daily plastic sundries (except plastic particles), Manufacturing, processing and sales of plastic parts, daily metal products, household kitchen appliances, metal tableware and utensils; general contracting of water treatment projects; manufacturing, installation and sales of water treatment equipment and environmental protection equipment; design and construction of environmental protection projects; import and export of goods and technology import and export.