The Chinese communist movement in the 1960s and 1970s with the aim of crushing "the four olds" was known as

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The movement being described here was the Great Proletarian Cultural Revolution, which took place in China from 1966 to 1976. Its aim was to eliminate the old ideas, culture, customs, and habits of pre-revolutionary China, which were seen as obstacles to the development of socialism. This was encapsulated in the slogan "smash the four olds" (old ideas, old culture, old customs, and old habits). The other choices listed relate to different periods or policies in Chinese history.

The Chinese Communist Movement in the 1960s and 1970s with the Aim