Aerial photo taken on June 14, 2022 shows grape greenhouses in the Baijitan national ecological reserve of Lingwu, northwest China's Ningxia Hui Autonomous Region. Photo:Xinhua

Aerial photo taken on June 15, 2022 shows a view of Baijitan national ecological reserve of Lingwu, northwest China's Ningxia Hui Autonomous Region. Photo:Xinhua

Aerial photo taken on June 14, 2022 shows a view of Baijitan national ecological reserve of Lingwu, northwest China's Ningxia Hui Autonomous Region. Photo:Xinhua

Aerial photo taken on June 16, 2022 shows a view of Baijitan national ecological reserve of Lingwu, northwest China's Ningxia Hui Autonomous Region. Photo:Xinhua

In this aerial photo, sand control workers make straw checkerboard barriers in the Baijitan national ecological reserve of Lingwu, northwest China's Ningxia Hui Autonomous Region, June 16, 2022. Photo:Xinhua

Aerial photo taken on June 15, 2022 shows a view of an exhibition hall showcasing China's sand control efforts in the Baijitan national ecological reserve of Lingwu, northwest China's Ningxia Hui Autonomous Region. Photo:Xinhua

Aerial photo taken on June 14, 2022 shows plastic greenhouses in the Baijitan national ecological reserve of Lingwu, northwest China's Ningxia Hui Autonomous Region.Photo:Xinhua

Aerial photo taken on June 16, 2022 shows a view of Baijitan national ecological reserve of Lingwu, northwest China's Ningxia Hui Autonomous Region. Photo:Xinhua

Workers pick green beans in a plastic greenhouse in the Baijitan national ecological reserve of Lingwu, northwest China's Ningxia Hui Autonomous Region, June 14, 2022.Photo:Xinhua

Aerial photo taken on June 14, 2022 shows a view of Baijitan national ecological reserve of Lingwu, northwest China's Ningxia Hui Autonomous Region. Photo:Xinhua