Research, development, design, installation, sales, and maintenance of general equipment and accessories; import and export of various goods and technologies (excluding those goods and technologies that are subject to state-ordered business operations or prohibited from import and export); (Operate as required by laws and regulations, business operation permit available) General projects: sales of semiconductor device equipment; sales of electronic equipment; equipment repair; sales of metal materials; sales of metal products; wholesale of hardware products; wholesale of electronic components; sales of instruments and meters; sales of electrical equipment; sales of plastic products; sales of special labor protection products; wholesale of medical staff protective supplies; sales of chemical products (excluding licensed chemical products); (Except as otherwise required by laws and regulations, independently operate and manage in accordance with the business license)