Politicization is one of the most fundamental characteristics of Chinese society, manifested in the direct and comprehensive control of society by the Chinese Communist Party (CCP). Methods include soft control through ideology and coercive control through campaigns. Based on the varying degrees of the CCP’s social control, the trajectory of China’s regime politicization can be divided into four periods: (1) the politicized regime of 1949–1965, (2) the hyper-politicized regime of 1966–1978, (3) the de-politicized regime of 1979–2012, and (4) the re-politicized regime of 2013–2023. We established an annual politicization index for the years 1949 to 2023 through a content analysis of two million articles in the People’s Daily, validating the trajectory of politicization changes in China. We use a model analysis of CCP membership attainment to demonstrate the applicability of the index in assessing how regime dynamics affect Party membership across the four periods.
