General items: sales of chemical products (excluding licensed chemical products); sales of machinery and equipment; wholesale of hardware products; retail of hardware products; sales of daily glass products (except for projects that require approval according to law, business activities can be carried out independently with a business license and in accordance with the law) ) Licensed items: import and export of goods (items that require approval according to law can only be carried out with the approval of relevant departments, and specific business items are subject to the approval results)