Yantai Hongyuan Oxygen Co., Ltd. is the biggest pointed enterprise inside China for producing the medical air compressing oxygen chamber, which has manufactured more than 1200 sets of “Hongyuan Brand” medical air compressing oxygen chambers and decompressing diving chambers in past years, spreading all over whole country. The sales income in 2008 reached RMB 120,000,000.00 yuan, every year, it can make 122 sets of medical air compressing oxygen chambers and diving decompressing chambers with more than fifty-five percent of market occupancy, among them, there are 23 sets of large medical air compressing oxygen chamber, the occupancy is up to 70%, ” now, “Hongyuan” brand has been recognized the best brand in Chinese oxygen chamber trade.