Manufacturing of construction machinery, metal structures, marine engineering special equipment, metallurgical special equipment, conveying machinery, special production vehicles, and continuous handling equipment; processing of mechanical parts, metal surface treatment and heat treatment, and fireworks machinery equipment; sales of general mechanical equipment and logistics equipment; remanufacturing of automotive parts; production of railway equipment, track equipment, and materials; self-operated and agent import and export of various goods and technologies, except those restricted or prohibited by the state; intelligent equipment manufacturing and sales; construction machinery repair services; mechanical technology consulting and exchange services; retail of mechanical parts; intelligent technology services; general equipment repair.