Aerial photo taken on April 27, 2019 shows a scenery of Gandong Township of Rongshui Miao Autonomous County, south China's Guangxi Zhuang Autonomous Region. (Xinhua/Huang Xiaobang)

Aerial photo taken on April 27, 2019 shows sea of clouds in Gandong Township of Rongshui Miao Autonomous County, south China's Guangxi Zhuang Autonomous Region. (Xinhua/Huang Xiaobang)

Aerial photo taken on April 26, 2019 shows a scenery of Gandong Township of Rongshui Miao Autonomous County, south China's Guangxi Zhuang Autonomous Region. (Xinhua/Huang Xiaobang)

Aerial photo taken on April 26, 2019 shows a scenery of Gandong Township of Rongshui Miao Autonomous County, south China's Guangxi Zhuang Autonomous Region. (Xinhua/Huang Xiaobang)