破四旧

Destroy the Four Olds (campaign of the Cultural Revolution)

broken / damaged / worn out / lousy / rotten / to break, split or cleave / to get rid of / to destroy / to break with / to defeat / to capture (a city etc) / to expose the truth of

four / 4

the Four Olds (target of the Cultural Revolution)

old / opposite: new 新 / former / worn (with age)