People walk on a glass corridor at the Tianmen Mountain National Forest Park in Zhangjiajie, central China's Hunan Province, Sept. 7, 2016. (Xinhua/Long Hongtao)
People walk on a glass corridor at the Tianmen Mountain National Forest Park in Zhangjiajie, central China's Hunan Province, Sept. 7, 2016. (Xinhua/Long Hongtao)