Gang of Four: Jiang Qing 江青[Jiang1 Qing1], Zhang Chunqiao 張春橋|张春桥[Zhang1 Chun1 qiao2], Yao Wenyuan 姚文元[Yao2 Wen2 yuan2], Wang Hongwen 王洪文[Wang2 Hong2 wen2], who served as scapegoats for the excesses of the cultural revolution
Definitions (Wiktionary)
name
the Gang of Four, a leftist political faction composed of four Chinese Communist Party officials that came to prominence during the Chinese Cultural Revolution