Longfian Scitech Co., Ltd, a leading manufacturer, specializing in oxygen solutions for 25 years, has been professionally dedicated to R&D, production and marketing of oxygen concentrators for a variety of applications including medical oxygen therapy, indoor oxygen supply, plateau environment, industrial, veterinary and other industries. Longfian is headquartered in Baoding, China. We have 520 employees, covering an area of 40,000 square meters, with annual production capacity of 1.5 million units.