
Tourists visit the Ten-Mile Gallery in Wulingyuan scenic area in Zhangjiajie, central China's Hunan Province, May 8, 2020. (Photo by Wu Yongbing/Xinhua)

A sightseeing train runs at the Ten-Mile Gallery in Wulingyuan scenic area in Zhangjiajie, central China's Hunan Province, May 8, 2020. (Photo by Wu Yongbing/Xinhua)

Tourists visit the Ten-Mile Gallery in Wulingyuan scenic area in Zhangjiajie, central China's Hunan Province, May 8, 2020. (Photo by Wu Yongbing/Xinhua)

A sightseeing train runs at the Ten-Mile Gallery in Wulingyuan scenic area in Zhangjiajie, central China's Hunan Province, May 8, 2020. (Photo by Wu Yongbing/Xinhua)