The film was produced and released under the term of chairman Mao Zedong when the cultural revolution was still ongoing.

After talking to the girls, Li Guohua discovers that they were taught the song by a candy seller (Huang Yilang).

The girls promise not to listen to such songs again and to follow Mao Zedong's teachings.

The students eventually surround and denounce Huang Yilang when he returns to the school to sell candy and teach songs.

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