General Projects: Rental of construction machinery and equipment; sale of building materials; mold sales; recovery of production waste metals; rental services (excluding licensed rental services); equipment rental; building cleaning services; engineering management services; wholesale of hardware products; domestic freight forwarding services. (Except as otherwise required by law, business operations are conducted independently and autonomously based on the business license.) License Projects: Installation, modification, and repair of special equipment; construction of construction projects; specialized construction operations; surveying and design of construction projects. (If otherwise required by law, business operations are conducted in accordance with the relevant administrative approval documents and permits. Specific business operations are subject to the approval documents or permits issued by the administrative authorities.) (Business operations involving prohibited or restricted projects in accordance with national and municipal industrial policies are prohibited.)