Wholesale of electronic products; Retail of electronic products; Electronic product testing; Electronic product design services; Wholesale of rubber products; Retail of rubber products; Wholesale of plastic products; Repair of instruments and meters; Wholesale of instruments and meters; Wholesale of sports goods and equipment; Retail of sports goods and equipment; Beauty and fitness consulting services; Fitness services; National fitness technology services; Sports consulting services; Consultation on fitness techniques; Rental of sports equipment and equipment; Technical research and development of sports equipment; Sports equipment installation services; Non licensed medical device operation; Retail of medical supplies and equipment (excluding drugs and medical devices);