(230323) -- KUNMING, March 23, 2023 (Xinhua) -- Staff members Yin Yuemiao (R), Peng Xiaoqing (C) and Li Xiaoli go to work at Shangri-La National Atmospheric Background Station in the Deqen Tibetan Autonomous Prefecture of southwest China's Yunnan Province, on March 9, 2023. Shangri-La National Atmospheric Background Station, located in the Deqen Tibetan Autonomous Prefecture of southwest China's Yunnan Province with an altitude of over 3,500 meters, is one of the seven atmospheric background stations in China. At present, a total of six staff members of the station record atmospheric monitoring data here day after day. The atmospheric background station has carried out more than 30 kinds of observation projects such as greenhouse gases, reactive gases and aerosols. (Xinhua/Hu Chao)