- abbreviation of 马克思 馬克思Karl MarxKarl Marx (1818-1883), German revolutionary, economist, and historian; author of "The Communist Manifesto" and "Das Kapital"
- abbreviation of 列宁 列寧LeninVladimir Ilyich Lenin (1870–1924), Russian revolutionary and founder of the Soviet Union
- abbreviation of 毛泽东 毛澤東Mao ZedongMao Zedong (1893–1976), the leader of the Chinese Communist Party and founder of the People's Republic of China