Research and development, production, processing and sales of auto parts, motorcycle parts, electromechanical products, turbochargers, impellers, turbines and precision castings; wholesale and retail of steel and plastic products; import and export of goods, road general cargo transportation; research and development, manufacturing, sales, maintenance and technical services of aircraft parts, components, ground equipment, navigation equipment parts, rubber and plastic products, other mechanical parts and molds; design, manufacturing and sales of electromechanical equipment and electronic components; technology and management consulting; import and export of goods and technology. .