Mechanical parts and parts processing; Auto parts and accessories manufacturing; Automobile sales; New energy vehicle sales; Auto parts retail; Motorcycle and spare parts wholesale; Automobile decoration supplies sales; Goods import and export; Technology import and export; Mechanical equipment sales; Civil aviation material sales; Software development; Artificial intelligence application software development; Software sales; Software outsourcing services; Computer software, hardware and auxiliary equipment retail; Information technology consulting services services; mechanical equipment research and development; mechanical equipment leasing; general machinery and equipment installation services; special equipment repair; general equipment repair; trade brokerage; conference and exhibition services; chemical product sales (excluding licensed chemical products); metal material sales; building materials sales; daily necessities sales; first-class medical device sales; second-class medical device sales; second-hand car brokerage; industrial textile finished product sales; clothing and apparel retail; furniture sales.