In elementary schools in the 1980s, especially in the cold winter months, the old-fashioned glass windows on all sides of the classroom could not withstand the cold wind.
On days when air conditioning and heating are not available, children rely on coal for heating. Near the windows of the podium are neatly arranged coal stoves and honeycomb briquettes. Exhaust chimneys made of white iron sheets are connected to the stove in a figure-7 shape through the glass.
Under the assignment of the comrade class teacher, the supreme leader of the class, the labor committee is responsible for receiving coal balls, exchanging coal balls, inspecting and regulating the heat, discharging slag and other heating work, and is transformed into a boiler worker who selflessly dedicates himself to heating work.
The seats of students with excellent grades close to the podium can naturally have more warmth. Uneducated students are assigned to the last corner of the classroom to let go of freedom and let the cold wind rage.
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