百花齐放，百家争鸣
bǎi​huā​qí​fàng, bǎi​jiā​zhēng​míng

diversity of thought

百花齐放，百家争鸣 (百花齊放，百家爭鳴) bǎi​huā​qí​fàng, bǎi​jiā​zhēng​míng
diversity of thought
a hundred flowers bloom, a hundred schools of thought contend; refers to the classical philosophic schools of the Warring States period and Mao Zedong's 1956 campaign

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Definitions
CC-CEDICT