Manufacturing of refrigeration and air-conditioning equipment; sales of refrigeration and air-conditioning equipment; sales of Class II medical devices; manufacturing of household appliances; sales of household appliances; sales of electric heating food processing equipment; sales of artificial intelligence hardware; development of basic software for artificial intelligence; technical consulting services for artificial intelligence public service platforms; sales of vending machines; low-temperature warehousing (excluding hazardous chemicals and other items requiring license approval); sales of trams; sales of batteries; retail of motorcycles and spare parts; goods import and export licensing projects: production of Class II medical devices