Sun Zhengcai (Chinese: ???; born September 25, 1963) is a former Chinese politician and senior regional official.
From 2012 to 2017, Sun served as the Communist Party Secretary of Chongqing, an interior municipality, and a member of the Politburo of the Communist Party of China.
Prior to that, he served as the Party Secretary of Jilin province, and Minister of Agriculture of China.
Sun was abruptly removed from office in July 2017 and put under investigation by the Central Commission for Discipline Inspection (CCDI).
The CCDI accused him of political and criminal wrongdoing, and he was expelled from the Communist Party of China.
He was convicted of bribery and sentenced to life imprisonment in 2018.
Sun was the youngest member of the 18th Politburo of the Communist Party of China, and the fourth sitting Politburo member to be expelled from the party since 1990.
Prior to his fall from grace, Sun was once considered to be a leading candidate for a top leadership position in the "6th Generation of Chinese leadership".