摘要
Sanjiangyuan National Park,one of the first batches established in China,is home to the sources of the Yangtze,Yellow and Lancang rivers.It is the largest of its kind in the country,covering an area of 123,100 square kilometers.With an average altitude(海拔)of about 4,500 meters,the Sanjiangyuan area sits on the Qinghai-Tibet Plateau,parts of which span southwest China's Xizang Autonomous Region and northwestern Qinghai Province.Sanjiangyuan is usually seen as a dry and cold area due to its high altitude.
