Manufacturing of metal tools; sales of metal tools; manufacturing of daily-use metal products; manufacturing of daily-use ceramic products; sales of daily-use ceramic products; manufacturing of plastic products; sales of plastic products; manufacturing of enamel products; sales of enamel products; manufacturing of household products; sales of household products; manufacturing of daily-use glass products; sales of daily-use glass products; manufacturing of glass insulation containers. (Projects that require approval according to the law may only be carried out after approval by relevant departments)