General project: Electronic components manufacturing; Research and development of electronic special materials; Sales of power electronic components; Other electronic device manufacturing; Sales of electronic products; Audio equipment manufacturing; Audio equipment sales; Plastic products manufacturing; Sales of plastic products; Synthetic materials sales; Research and development of household appliances; Professional design services. (Except for the items subject to approval according to law, independently carry out business activities according to law with the business license) Permitted items: Import and export of goods; Technology import and export. (For projects subject to approval according to law, business activities can only be carried out after approval by relevant departments, and specific business projects shall be subject to approval by relevant departments, documents or licenses. )