the four elements: earth, water, fire, and wind (Buddhism) / the four freedoms: speaking out freely, airing views fully, holding great debates, and writing big-character posters, 大鳴大放|大鸣大放[da4 ming2 da4 fang4], 大辯論|大辩论[da4 bian4 lun4], 大字報|大字报[da4 zi4 bao4] (PRC)
Gang of Four: Jiang Qing 江青, Zhang Chunqiao 張春橋, Yao Wenyuan 姚文元, Wang Hongwen 王洪文, who served as scapegoats for the excesses of the cultural revolution