Tourists experience drifting at Shunhuangshan National Forest Park in Dongan County, central China's Hunan Province, June 16, 2019. (Xinhua/Yan Jie)

　　Tourists experience drifting at Shunhuangshan National Forest Park in Dongan County, central China's Hunan Province, June 16, 2019. (Xinhua/Yan Jie)

　　Tourists experience drifting at Shunhuangshan National Forest Park in Dongan County, central China's Hunan Province, June 16, 2019. (Xinhua/Yan Jie)