The scientific expedition team of the Changjiang River Scientific Research Institute conducts research in Zadoi county, Qinghai province, in the source area of the Lancang River. XIAO YIJIU/XINHUA As a key part of the Qinghai-Tibet Plateau ecosystem, the sources of the Yangtze and Lancang rivers are sensitive to climate change and the fragile ecological environment. In the Yushu Tibetan autonomous …