Chairman Mao was a serial killer and a mass murderer.

The Chinese Cultural Revolution (1966-1976) was a historical tragedy launched by Mao Zedong and the Chinese Communist Party (CCP). It claimed the lives of several million people and inflicted cruel and inhuman treatments on hundreds of million people. However, 40 years after it ended, the total number of victims of the Cultural Revolution and especially the death toll of mass killings still remain a mystery both in China and overseas. For the Chinese communist government, it is a highly classified “state secret,” although they do maintain statistics for the so-called “abnormal death” numbers all over China. Nevertheless, the government, realizing that the totalitarian regime and the endless power struggles in the CCP Central Committee (CCP CC) were the root cause of the Cultural Revolution, has consistently discounted the significance of looking back and reflecting on this important period of Chinese history. They even forbid Chinese scholars from studying it independently and discourage overseas scholars from undertaking research on this subject in China.

Worth taking a look at.

https://www.sciencespo.fr/mass-violence-war-massacre-resistance/en/document/chronology-mass-killings-during-chinese-cultural-revolution-1966-1976