Prohibited from engaging in business: any activities prohibited by laws, regulations, or decisions of the State Council; permitted to engage in business (subject to approval) after obtaining approval from the relevant approval authority and operating based on the approval document; and businesses may independently choose to operate without the need for approval (subject to approval) as stipulated by laws, regulations, or decisions of the State Council. (Retail of hardware; sales of high-quality special steel materials; sales of metal materials; sales of construction materials; retail of hardware products; agency for domestic trade; agency for domestic freight transportation; road freight transportation (excluding dangerous goods); as permitted by relevant business operation regulations.)