Metal structure manufacturing; Metal tool manufacturing; Manufacturing of metal daily necessities; Manufacturing of metal products for construction and safety; Mold manufacturing; Manufacturing of electronic components and electromechanical component equipment; Manufacturing of other electronic specialized equipment; Manufacturing of other electronic equipment; Wholesale of building materials; Wholesale of hardware products; Wholesale of other mechanical equipment and electronic products; Retail of other electronic products. (Projects that require approval according to law can only be operated with the approval of relevant departments. ) (Projects that require approval according to law can only be operated with the approval of relevant departments. )