R&D, manufacturing, and sales: automobile transmission assemblies, automobiles, motorcycles, and farm machine parts (excluding engines), precision mechanical parts, mechanical tools, fixtures, and measuring tools; procurement and sales of: metal materials (excluding rare and precious metals); engaged in the import and export of goods or technologies (except for the import and export of goods and technologies prohibited by the state or involving administrative approval). [Business projects that require approval can only be operated after obtaining approval].