Aerial photo taken on Sept. 22, 2019 shows rice paddy art in Helan County, northwest China's Ningxia Hui Autonomous Region. (Photo: China News Service/Li Peishan)

Aerial photo taken on Sept. 22, 2019 shows rice paddy art in Helan County, northwest China's Ningxia Hui Autonomous Region. (Photo: China News Service/Li Peishan)