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Fan Yue (front) and Dong Shiqi, members of a scientific expedition team, operate ground penetrating radar in the headwater region of the Lancang River in Zadoi County, Yushu Tibetan Autonomous Prefecture, northwest China s Qinghai Province, July 24, 2022.

Yangtze riverChina generalXu pingLi ludanXinhua xiao yijiuDong shiqiLiu hanSanjiangyuan national parkChangjiang river scientific research instituteChangjiang water resources commissionLancang riverZadoi countyYushu tibetan autonomous prefectureQinghai provinceXiao yijiuQinghai tibet plateau