
A boat sails in the Jiudian Gorge in Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province, Sept. 8, 2017. (Xinhua/Chen Yonggang)
A boat sails in the Jiudian Gorge in Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province, Sept. 8, 2017. (Xinhua/Chen Yonggang)