Manufacturing of hardware products; manufacturing of metal tools; manufacturing of metal structures; manufacturing of metal daily-use articles; manufacturing of hand carts and animal-drawn vehicles; manufacturing of furniture; manufacturing of plastic products; wholesale of hardware products; sales of hand carts and animal-drawn vehicles; sales of metal chains and other metal products; retail of hardware products; sales of metal structures; sales of metal materials; research and development of metal products; sales of metal products; sales of rubber products; sales of plastic products; sales of metal tools; sales of office supplies; sales of labor protection supplies; sales of building materials; sales of chemical products (excluding licensed chemical products); goods import and export.