Local Tibetans celebrate before the first flight took off at the Yushu airport, the first civil airport in the Sanjiangyuan region, in northwest China's Qinghai province, August 1, 2009. The Sanjiangyuan region, meaning "the source of three rivers" literally, is an area where the Yangtze River, the Yellow River and the Lancang River originate. [Asianewsphoto]