A herd of over 100 white-lipped deer, under China's first-class national protection, migrate on the frozen Yellow River in Sanjiangyuan National Park in northwest China's Qinghai Province. (Photo/China News Service)
A herd of over 100 white-lipped deer, under China's first-class national protection, migrate on the frozen Yellow River in Sanjiangyuan National Park in northwest China's Qinghai Province. (Photo/China News Service)
A herd of over 100 white-lipped deer, under China's first-class national protection, migrate on the frozen Yellow River in Sanjiangyuan National Park in northwest China's Qinghai Province. (Photo/China News Service)
A herd of over 100 white-lipped deer, under China's first-class national protection, migrate on the frozen Yellow River in Sanjiangyuan National Park in northwest China's Qinghai Province. (Photo/China News Service)
A herd of over 100 white-lipped deer, under China's first-class national protection, migrate on the frozen Yellow River in Sanjiangyuan National Park in northwest China's Qinghai Province. (Photo/China News Service)
A herd of over 100 white-lipped deer, under China's first-class national protection, migrate on the frozen Yellow River in Sanjiangyuan National Park in northwest China's Qinghai Province. (Photo/China News Service)