gōng​nóng​bīng

workers, peasants, soldiers

工农兵 (工農兵) gōng​nóng​bīng
workers, peasants, soldiers abbreviation
the social classes of workers, peasants, and soldiers, considered the core of the revolutionary force in Maoist China

Artistic works from that period had to serve workers, peasants, and soldiers.

Frequency

Written text
4.09 per million

Sources

Definitions
CC-CEDICT
Frequency data
BCC Corpus (BLCU)