Members to maintain ecological security patrol to collect garbage in a village of Madoi County, Golog Tibetan Autonomous Prefecture, northwest China's Qinghai Province, Aug. 19, 2020. Sanjiangyuan, meaning the "source of three rivers," is home to the headwaters of the Yangtze, Yellow and Lancang rivers. To improve the local ecological environment, members to maintain ecological security of local monitoring stations play a key role in retrieving litters, protecting grasslands, monitoring animals and preventing poaching. (Xinhua/Zhang Long)
