Comparison of United States incarceration rate with other countries
The incarceration rate of the People's Republic of China varies depending on sources and measures. According to the World Prison Brief, the rate for only sentenced prisoners is 118 per 100,000 (as of 2015). The rate for prisoners including estimations for the number of pre-trial detainees and those in administrative detention is 164 per 100,000 (as of 2015). In a 2010 interview Harry Wu, a U.S.-based human rights activist and ex-Chinese labor camp prisoner, estimates that "in the last 60 years, more than 40–50 million people" were in Chinese labor camps, but that period includes the mass incarcerations of the 1950s or the Cultural Revolution (1966-1976) and is not representative of modern China.
Anti-corruption campaign under Xi Jinping
Investigations by the party's disciplinary bodies are not part of the state judicial system. When an official is detained for an investigation, known as "Shuanggui", they are essentially placed under house arrest and are isolated from the outside world. The subject often must endure days of grueling interrogation. Data from the first half of 2014 showed that the conviction rate of those who were investigated in that time period to be around 99%. The CCDI and its local counterparts usually gather evidence covertly well in advance of detaining the subject. Generally, when an official is announced to be under investigation, the CCDI has already collected an overwhelming amount of hard evidence. China scholar Willy Lam also wrote that the CCDI has seen a massive expansion of its powers since Xi's ascension, and that it was increasingly involved in the governance of the state. Lam also contended that the CCDI seemed to be deriving most of its power from Xi Jinping personally.