On September 26, the release conference of 2018 "China's Natural Oxygen Bar" activity was held in Beijing, with Simao District of Pu'er City winning the honor.
The "China's Natural Oxygen Bar" activity was initiated by China Meteorological Service Association in 2016 and carried out annually. It mainly evaluates the eco-environmental quality, such as climate, air quality, atmospheric negative ion level, as well as ecological and tourism development planning, and tourism matching.