Hardware product research and development; vacuum coating processing; metal surface treatment and heat treatment processing; hardware product wholesale; metal tool manufacturing; metal daily necessities manufacturing; glasses manufacturing; glasses sales (excluding contact lenses); sanitary ceramic products manufacturing; sanitary ware manufacturing; sanitary ware sales; auto parts and accessories manufacturing; auto parts wholesale; motorcycle parts manufacturing; Wholesale of motorcycles and spare parts; manufacturing of fasteners; sales of fasteners; manufacturing of plastic products; sales of plastic products; manufacturing of daily necessities; sales of daily necessities; wholesale of kitchenware and sanitary ware and daily necessities; sales of daily necessities; manufacturing of household appliances; sales of household appliances; manufacturing of distribution switch control equipment; sales of distribution switch control equipment; manufacturing of household items; sales of household items. Licensed items: import and export of goods; import and export of technology.