Production of Class II medical devices. General items: Sales of Class II medical devices; sales of electric bicycles; hardware product manufacturing; hardware product retail; motorcycle spare parts manufacturing; motorcycle and spare parts retail; motorcycle and spare parts wholesale; metal material manufacturing; metal material sales; metal tool manufacturing; metal tool sales; special equipment manufacturing (excluding licensed professional equipment manufacturing); general equipment manufacturing (excluding special equipment manufacturing); general equipment repair; mechanical equipment sales; import and export of goods; import and export of technology.