Aerial photo taken on June 23, 2022 shows the Xingxinghai Lake in Maduo County of Golog Tibetan Autonomous Prefecture, northwest China's Qinghai Province. Sanjiangyuan, which means the "source of three rivers," is home to the headwaters of the Yangtze, Yellow and Lancang rivers. The area provides the lower reaches of these major rivers with more than 60 billion cubic meters of water annually. Home to Sanjiangyuan, the province of Qinghai has been dubbed "the water tower of China." The Sanjiangyuan area once witnessed large-scale ecological degradation as a result of natural changes and human activities. The headwaters of the Yellow River were once cut off and many of the grasslands that herders relied on for their livelihood became barren. Beginning in 2005, China launched a major ecological project to protect and restore the environment in Sanjiangyuan. In 2016, China started piloting the Sanjiangyuan National Park. Thanks to the protective measures, the ecological environment in the area has steadily improved. [Photo by Han Fangfang/Xinhua]

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