Sales of metal products; Wholesale of hardware products; Sales of metal structures; Sales of metal materials; Sales of building materials; Sales of arts and crafts and ceremonial supplies (excluding ivory and its products); Sales of building decoration materials; Sales of packaging materials and products; Sales of office equipment; Sales of daily necessities; Sales of needle textiles and raw materials; Construction of landscaping and greening projects; Sales of metal chains and other metal products; Sales of new metal functional materials; Sales of metal wire ropes and their products; Labor services (excluding labor dispatch); Import and export agency; Import and export of goods; Technology import and export; Metal surface treatment and heat treatment processing; Non metallic waste and debris processing; Steel rolling processing; Manufacturing of metal processing machinery; Processing and treatment of metal waste and debris; Rolling and processing of non-ferrous metals; Mold manufacturing; Manufacturing of metal tools; Manufacturing of metal structures; Manufacturing of metal chains and other metal products; Manufacturing of metal daily necessities; Manufacturing of non-ferrous metal alloys; Manufacturing of metal materials; Manufacturing of metal fittings for construction; Manufacturing of metal packaging containers and materials