Low-noise precision bearings, main engine bearings, motorcycle accessories, auto parts, hardware accessories, plastic products, rubber products manufacturing and processing, steel pipe retail and wholesale; self-operated and agency import and export of goods and technologies, except for goods and technologies that are restricted by the state or prohibited from import and export, and other items that are not prohibited or do not require a business license according to laws, regulations, decisions of the State Council, etc., and items that are not included in the negative list for local industrial development.