Manufacture and sales of electronic products and handicrafts (except items involving special national examination and approval regulations); Sales of daily necessities (except electric tricycles), glass products, and building materials (except sand and gravel); Self-operated and agency import and export business of various commodities and technologies (Except for the commodities and technologies that the state restricts the operation of enterprises or prohibits import and export). (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments)