Marking the fifth anniversary of the establishment of China's first batch of national parks, CGTN takes you to Sanjiangyuan National Park, home to the sources of the Yangtze, Yellow and Lancang rivers. Located on the Qinghai-Xizang Plateau, the park covers 123,100 square kilometers, making it the largest national park in China. With an average elevation of around 4,500 meters, the region is a vital part of the plateau's unique ecosystem and plays a crucial role in protecting the headwaters of three major rivers in Asia.