Dong Shiqi (L), Ding Peizhong (C) and Fan Yue, members of a scientific expedition team of the Changjiang River Scientific Research Institute (CRSRI) conduct investigation with ground-penetrating radar at Mount Geladandong in northwest China's Qinghai Province, July 28, 2022. Chinese scientists launched an expedition on July 24 in the headwater regions of the Yangtze and Lancang rivers in northwest China's Qinghai Province, to investigate the regions' water resources and ecological environment. Photo: Xinhua

Dong Shiqi, member of a scientific expedition team of the Changjiang River Scientific Research Institute (CRSRI), climbs a glacier at Mount Geladandong in northwest China's Qinghai Province, July 28, 2022. Photo: Xinhua

Members of a scientific expedition team of the Changjiang River Scientific Research Institute (CRSRI) make their way to an investigation site at Mount Geladandong in northwest China's Qinghai Province, July 28, 2022. Photo: Xinhua

Ding Peizhong (1st L), Dong Shiqi (2nd L), and Fan Yue (3rd L), members of a scientific expedition team of the Changjiang River Scientific Research Institute (CRSRI) conduct investigation with ground-penetrating radar at Mount Geladandong in northwest China's Qinghai Province, July 28, 2022. Photo: Xinhua

Dong Shiqi (L), Fan Yue (C), and Ding Peizhong, members of a scientific expedition team of the Changjiang River Scientific Research Institute (CRSRI) pose for a photo at Mount Geladandong in northwest China's Qinghai Province, July 28, 2022. Photo: Xinhua

Members of a scientific expedition team of the Changjiang River Scientific Research Institute (CRSRI) transport investigation gears at Mount Geladandong in northwest China's Qinghai Province, July 28, 2022. Photo: Xinhua

Aerial photo taken on July 28, 2022 shows members of a scientific expedition team of the Changjiang River Scientific Research Institute (CRSRI) making their way at Mount Geladandong in northwest China's Qinghai Province. Photo: Xinhua