Aerial photo taken on July 27, 2021 shows a view of Qumar River at the Sanjiangyuan National Park in northwest China's Qinghai Province. Sanjiangyuan, meaning the "source of three rivers," is home to the headwaters of the Yangtze, Yellow and Lancang rivers. The ecological system has been steadily improving in recent years in the Sanjiangyuan National Park, making it a habitat of an increasing number of wild animals. (Xinhua/Zhang Long)
