General projects: engineering and technical research and experimental development; Manufacturing of optoelectronic devices; Sales of optoelectronic devices; Manufacturing of synthetic materials (excluding hazardous chemicals); Sales of synthetic materials; Sales of electronic products; Sales of communication equipment; Glass fiber and product manufacturing; Sales of glass fiber and products; Manufacturing of plastic products; Sales of plastic products. (Except for projects that require approval in accordance with the law, business activities shall be carried out independently with the business license in accordance with the law)