Manufacturing and processing of auto parts, motorcycle parts, electric bicycles and accessories, plastic industrial parts, and mechanical parts; self-operated and agency import and export business of various commodities and technologies, except for commodities and technologies that are restricted by the state or prohibited from import and export by enterprises. Sales of engineering plastics and synthetic resins; sales of plastic products; sales of metal materials; textile processing of fabrics; manufacturing of home textile products; manufacturing of industrial textile products; sales of industrial textile products; production of daily masks (non-medical); sales of daily masks (non-medical);