Students read books in the classroom at Luqu Tibetan Middle School in Luqu County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province, Aug. 30, 2021.Photo:Xinhua

Aerial photo taken on Aug. 30, 2021 shows Luqu Tibetan Middle School in Luqu County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province.Photo:Xinhua

A staff member prepares dinner for the students at Luqu Tibetan Middle School in Luqu County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province, Aug. 30, 2021.Photo:Xinhua

Students get food at the canteen of Luqu Tibetan Middle School in Luqu County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province, Aug. 30, 2021.Photo:Xinhua

Students talk to each other on campus at Luqu Tibetan Middle School in Luqu County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province, Aug. 30, 2021.Photo:Xinhua

A teacher checks the sanitation condition of student canteen at Luqu Tibetan Middle School in Luqu County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province, Aug. 30, 2021.Photo:Xinhua

A student has her body temperature checked while entering Luqu Tibetan Middle School in Luqu County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province, Aug. 30, 2021.Photo:Xinhua

A student of the tenth grade registers her information at Luqu Tibetan Middle School in Luqu County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province, Aug. 30, 2021.Photo:Xinhua