BEIJING, June 6, Xinhua - A three-year scientific investigation on biodiversity of Sanjiangyuan started in 2012 has recorded at least 42 species of mammals, 102 species of birds, 214 species of insects and over 500 kinds of plants in Sanjiangyuan.


Liu Yanlin, a doctor of Peking University, introduces the situation of snow leopards during the three-year scientific investigation in Sanjiangyuan, at Peking university in Beijing, capital of China, June 5, 2015. (Xinhua/Tao Xiyi)

Located at an average altitude of 4,000 meters in northwest China's Qinghai Province, the Sanjiangyuan region is the cradle of the Yangtze, Yellow and Lancang rivers, and also a paradise for herders and wildlife.