The Red Guards - The New Cultural Revolution

The red guards were the shok troops of the culture revolution. They were tea nagers, boys and girls who had been given an exhilarating but terrifying message by mao. But they also unleashed a tremendous am a arc of violence. When they got out of control even mal desided that it was too much to have them rampainting through the streets,. and they were essentially shut down by the army. Now, another term that people might know from the culture revolution period is the four olds - what does that phrase mean?