中共中央党校
From 1937 on, he taught politics and Marxist philosophy at the Central Party School of the Communist Party of China in Yan'an, where he became a leader in the Yan'an Rectification Movement. He soon became personal research assistant and chief political aide to Mao Zedong. Chen published the first collection of Mao's writings in 1937, and an official history of the Party in 1945.