Five-character phonetic of Russian большевик ('one of the majority'). The Bolsheviks broke from the Mensheviks (
孟什维克, 'minority') at the RSDLP's 1903 congress, took power in October 1917, and renamed themselves the Communist Party in 1918. The Chinese transliteration was settled in the 1920s during the early CCP, when Soviet terminology flooded Chinese political writing.