A bird's eye view of the cloud-shrouded Tongtian River, a main stream of the source of the Yangtze River in northwest China's Qinghai Province. (Photo/China News Service)
Aerial photo shows the Tongtian River, a main stream of the source of the Yangtze River in northwest China's Qinghai Province. (Photo/China News Service)
Aerial photo shows the Tongtian River, a main stream of the source of the Yangtze River in northwest China's Qinghai Province. (Photo/China News Service)