The general business project is: Sales of electronic components. (The above does not include projects that require pre approval or prohibition as stipulated by laws, administrative regulations, or State Council decisions); Manufacturing of power electronic components; Manufacturing of power transmission, distribution and control equipment; Manufacturing of electronic components; Manufacturing of transformers, rectifiers, and inductors; Technical services, development, consultation, exchange, transfer, and promotion; Manufacturing of distribution switch control equipment; Research and development of distribution switch control equipment; Sales of power electronic components; Wholesale of electronic components; Retail of electronic components; Manufacturing of calculator equipment; Manufacturing of computer software, hardware, and peripheral equipment; Retail of computer software, hardware, and auxiliary equipment. (Except for projects that require approval in accordance with the law, business activities can be carried out independently with the business license in accordance with the law. ) The licensed business projects include the research and development and production of power filters. Import and export of goods. (For projects that require approval according to law, business activities can only be carried out with the approval of relevant departments. The specific business projects shall be subject to the approval documents or permits of relevant departments. )