A flock of Thorold's deer, also known as white-lipped deer, pass a road in Gongbo Gyamda County, southwest China's Tibet Autonomous Region, Nov. 2, 2013. Thorold's deer are China's first-class national protected animals. They live in the high and cold grasslands of the Tibetan Plateau. [Photo/Xinhua]

A flock of Thorold's deer, also known as white-lipped deer, pass a road in Gongbo Gyamda County, southwest China's Tibet Autonomous Region, Nov. 2, 2013. Thorold's deer are China's first-class national protected animals. They live in the high and cold grasslands of the Tibetan Plateau. [Photo/Xinhua]

A flock of Thorold's deer, also known as white-lipped deer, pass a road in Gongbo Gyamda County, southwest China's Tibet Autonomous Region, Nov. 2, 2013. Thorold's deer are China's first-class national protected animals. They live in the high and cold grasslands of the Tibetan Plateau. [Photo/Xinhua]

A flock of Thorold's deer, also known as white-lipped deer, pass a road in Gongbo Gyamda County, southwest China's Tibet Autonomous Region, Nov. 2, 2013. Thorold's deer are China's first-class national protected animals. They live in the high and cold grasslands of the Tibetan Plateau. [Photo/Xinhua]