Aerial photo taken on April 7, 2021 shows an unmanned seeder equipped with Beidou navigation satellite system working in a cotton field in northwest China's Xinjiang Uygur Autonomous Region. (Photo/China News Service)
Aerial photo taken on April 7, 2021 shows an unmanned seeder equipped with Beidou navigation satellite system working in a cotton field in northwest China's Xinjiang Uygur Autonomous Region. (Photo/China News Service)
Aerial photo taken on April 7, 2021 shows an unmanned seeder equipped with Beidou navigation satellite system working in a cotton field in northwest China's Xinjiang Uygur Autonomous Region. (Photo/China News Service)
Aerial photo taken on April 7, 2021 shows an unmanned seeder equipped with Beidou navigation satellite system working in a cotton field in northwest China's Xinjiang Uygur Autonomous Region. (Photo/China News Service)