Manufacturing of hydraulic power machinery and components; Mechanical parts and component processing; Spray coating processing; Metal surface treatment and heat treatment processing; Plastic surface treatment; Sales of hydraulic power machinery and components; Sales of mechanical parts and components; Wholesale of automotive spare parts; Mold sales; Sales of plastic products; Sales of painting equipment; Hardware product research and development; Wholesale of hardware products; Retail of hardware products; Sales of coatings (excluding hazardous chemicals); Sales of surface functional materials; Import and export of goods (except for projects that require approval according to law, business activities shall be conducted independently based on the business license in accordance with the law).