Proper noun
the Four Olds
(historical) The four traditional things targeted for destruction during China's Cultural Revolution, usually translated as old customs, old culture, old habits, and old ideas.
Some changes associated with the "Four Olds" campaign were largely benign, such as assigning new names to city streets, places, and even people; millions of babies were born with "revolutionary"-sounding names during this period. Source: Internet
To him, landscape paintings should also not be considered one of the "Four Olds". Source: Internet