It happened in China, and it is said that the principal at a high school even took this action to reduce the amount of leftover food left by students.
It is lunchtime at a high school in Hunan Province, China.
When the students have finished eating, they come to the trash can with their lunch plates, and a man devours all the food left by the students.
Only students who did not leave any food were allowed to leave the dining room, and some students, astonished by this, went back to the table with their lunch plates and ate the leftovers.
The man, who was recently appointed as the principal of this school, inspected the lunchroom and found that students were wasting food seriously.
In fact, it is said that students' food waste has decreased significantly since then, but some are questioning whether it was a voluntary act, as it happened after President Xi Jinping remarked last year that 'the phenomenon of food waste is heartbreaking'.
In addition, there are criticisms that it is inappropriate to do this in a situation sensitive to hygiene issues due to the recent re-spread of COVID-19 and food poisoning.