1. The business operates in more than 50 countries worldwide, mainly providing science-based breathing training methods, online courses, certification training, and related products to improve health, performance, and recovery. 2. In the health / medical sector, it is a globally leading breathing training brand; competitors include Wim Hof Method and Buteyko Breathing. 3. The official website brand terms are "Oxygen Advantage" or "OA呼吸法".