英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[da4 ming2 da4 fang4], 大辯論[da4 bian4 lun4], 大字報[da4 zi4 bao4] (PRC)
德Big Four